another word for irritant chemistry

noun. chemical reaction. 2005-06-24. Learn more. That which irritates or excites. tant This thesaurus page is about all possible synonyms, equivalent, same meaning and similar words for the term chemical irritant. Find another word for poison. Any agent by which irritation is produced; as, a chemical irritant; a mechanical or electrical irritant. & Med.) [1913 Webster] 3. UpToDate Updated 5 minutes 2 seconds ago|1/2/2022 6:31:42 AM. Inorganic Medicinals.docx - PHCH 1102 Topical Agents ... CAMEO Chemicals. Science View More. chemical composition. Meaning of chemical irritant. 'Inflammation makes the airways sensitive to stimuli such as allergens, chemical irritants, tobacco smoke, cold air, or exercise.'. Reactions to contact with various substances may be allergic or primary irritant in nature. [Cf. Irritant contact dermatitis ( L24) L24.5 is a billable diagnosis code used to specify a medical diagnosis of irritant contact dermatitis due to other chemical products. . Chemistry. Introvert and extrovert are antonyms. Irritant contact dermatitis develops when chemical or physical agents damage the skin surface faster than the skin can repair. Vesiculous lesions are rarely evident because of quick rupturing. Definition of irritant in the Definitions.net dictionary. Princeton's WordNet. What does chemical irritant mean? s. |Score 1| jls |Points 37|. 1-BROMO-4-FLUORONAPHTHALENE CAS 341-41-3 WIKI information includes physical and chemical properties, USES, security data, NMR spectroscopy, computational chemical data and more. Irritants remove oils and natural moisturising factor from the outer layer of the skin, allowing chemical irritants to penetrate the skin barrier and trigger inflammation. Causing irritation, especially physical irritation. HMIS (0 to 4) CAUTION! The compound is considered toxic and may be harmful by . Skin contact can produ ce inflammation and blistering. Learn more. capsaicin colorless pungent crystalline compound derived from capsicum; source of the hotness of hot peppers of the genus Capsicum such as chili and cayenne and jalapeno gingerol derived from ginger; source of the hotness of ginger piperin , piperine . chemical irritant Also found in: Dictionary, Medical . Calcium sulfate appears as odorless, white powder or colorless, crystalline solid. Sentence Examples Proper usage in context. . SYMPTOMS: Symptoms of exposure to this compound via inhalation include coughing, shortness of breath, dizziness, drunkenness and collapse. Triethanolamine is a tertiary amino compound that is ammonia in which each of the hydrogens is substituted by a 2-hydroxyethyl group. A poison is a substance with a systemic toxic effect. Synonyms Similar meaning. Rate it: (4.00 / 1 vote) DNA: A biopolymer of deoxyribonucleic acid that has four different chemical groups, called bases: adenine, guanine, cytosine, and thymine . While corrosive chemicals may be poisonous, the two characteristics are separate. 1. All Free. Simple Explanation of How Neon Lights Work. Ethylene oxide (C₂H₄O) is a flammable gas with a somewhat sweet odor. You can also browse global suppliers,vendor,prices,Price,manufacturers of 2,6-Piperidinedione, 3 . Chlorine is a potent irritant to the eyes, the upper respiratory tract, and lungs. Graphic Thesaurus Legend Synonym Antonym Related </>embed</> isothiocyanate piperine piperin gingerol capsaicin substance chemical i. noun Words related to chemical irritant noun a substance producing irritation Want to thank TFD for its existence? For further information on (Physiol. Key Acids and Bases Definitions. A chemical compound product is formed in the expansion chamber. Essential Chemistry for Aromatherapy This issue of Dermatologic Clinics, guest edited by Dr. Christen M. Mowad, will cover a number of important topics related to Allergic Contact Dermatitis. Prolonged skin contact may cause irritation. 1628323-80-7 Chemical Name: L-Lysinamide, N-(3-methyl-1-oxobutyl)-L-α-aspartyl-L-threonyl-L-histidyl-L-phenylalanyl-L-prolyl-L-cysteinyl-L-isoleucyl-N6-[N-(1 . Contact with the liquid can cause frostbite. What does irritant mean? Synonyms Similar meaning. It is shipped as a liquefied gas under its vapor pressure. Flame retardants are often added or applied to the following products. Princeton's WordNet. chemical irritant synonyms, chemical irritant pronunciation, chemical irritant translation, English dictionary definition of chemical irritant. Noun Bitter indignation at having been treated unfairly bitterness indignation pique irritation animosity displeasure grudge malice rancour UK acrimony anger discontentment disgruntlement dissatisfaction huff hurt ire antagonism antipathy discontent fury hate hatred hostility ill will jaundice rage resentfulness umbrage wrath down dudgeon enmity Site of action: small and large intestines Onset of action: 12-72 hours n. A source of irritation: tobacco smoke, a common eye irritant. ICD results from direct cytotoxic effect of irritants and, unlike allergic contact dermatitis, is not immune mediated. Additionally, waste generators must consult state and local hazardous waste regulations to ensure complete and accurate classification. 1. prussic-acid (related) 1. Approximate Synonyms. chemical irritant. toxic chemical cannot be substituted. chemical synonyms and trade names a dictionary and commercial handbook what you in the manner of to read! Sentence Examples Proper usage in context. CAS No. The Facts About Ammonia Technical Information. In this page you can discover 40 synonyms, antonyms, idiomatic expressions, and related words for corrosive, like: harmful, eroding, strongly acid, vitriolic, caustic, incisive, biting, acid, destructive, sarcastic and abrasive. Chlorine-like odor. Exposure to high concentrations have a narcotic effect and may cause liver and kidney damage. BHT is used in food, cosmetics and industrial fluids to prevent oxidation and free radical formation. Antonyms for Chemicals. In this page you can discover 94 synonyms, antonyms, idiomatic expressions, and related words for poison, like: toxin, toxic, bane, toxine, cause violent illness, infection, germ, empoison, arsenic . 'Some substances may not be irritants but if the skin becomes sensitised - or allergic - to them they may cause a reaction.'. chemical property. Body tissue irritant and slightly toxic by ingestion. Ingestion: Causes irritation to the gastrointestinal tract. Definition: adjective. Learn about chemical reactions, elements, and the periodic table with these resources for students and teachers. irritant definition: 1. something that causes trouble or makes you annoyed: 2. a substance that makes part of your body…. Noun 1. chemical irritant - a substance producing irritation substance - a particular kind or species of matter with uniform properties; "shigella is one of. Butylated hydroxytoluene (BHT) inhibits autoxidation of unsaturated organic compounds. chemical name. Workers may be harmed from exposure to ethylene oxide. Offers a "safety profile" of 5000 of the most important hazardous chemicals. They are: 1) naturally occurring, 2) inorganic, 3) solids, 4) with a definite chemical composition, and, 5) an ordered internal structure. Allergic stomatitis is characterized by erythema and oedema, combined with a burning sensation, loss of taste, and numbness rather than itching. noun. Define chemical irritant. IUPAC names, synonyms, CAS and EC numbers, structural formulas, RIFM and Merck Index monographs, SCCS opinions, IFRA and EU restrictions and advises on patch testing Presents an alphabetical list of all synonyms indicating their INCI names Covers an extensive amount of Synonyms for irritant aggravation, aggro [ British], annoyance, bother, botheration, bugbear, exasperation, frustration, hair shirt, hassle, headache, inconvenience, irk, nuisance, peeve, pest, rub, ruffle, thorn, trial, vexation Near Antonyms for irritant delight, joy, pleasure See the Dictionary Definition WORD OF THE DAY venerate Chemical agents are the main cause of occupational skin diseases and disorders. 21 Interesting Plutonium Facts. 7 synonyms for chemical: compound, drug, substance, synthetic substance, potion, chemical substance, chemic. chemical mechanism. 1,4-Dioxane (/ d aɪ ˈ ɒ k s eɪ n /) is a heterocyclic organic compound, classified as an ether.It is a colorless liquid with a faint sweet odor similar to that of diethyl ether.The compound is often called simply dioxane because the other dioxane isomers (1,2-and 1,3-) are rarely encountered.. Dioxane is used as a solvent for a variety of practical applications as well as in the laboratory . Maintain eye wash fountain and quick-drench facilities in work area. DNCB is also used as a reagent for the detection and determination of pyridine compounds. As an immediate precautionary measure, isolate spill or leak area for at least 100 meters (330 feet) in all directions. Learn more. 1 A substance that causes slight inflammation or other discomfort to the body. Hexamine, also known as Hexamethylenetetramine, CAS No. When heated to decomposition it emits toxic fumes of carbon . chemical phenomenon. hide 4 types. compound. Ethylhexylglycerin is a glyceryl ether used as a weak preservative and skin conditioning agent. Types Bulk-forming agents. Asked 10/2/2020 12:18:27 AM. Symptoms may include nausea, vomitin g and diarrhea. | Meaning, pronunciation, translations and examples However, many of these limits are outdated. Section 9 - Physical and Chemical Properties Appearance: Odor: Colorless to yellowish liquid. chemical irritant: 1 n a substance producing irritation Types: show 4 types. Meaning of irritant. hazards to which they may be exposed. What are synonyms for Chemicals? ACUTE/CHRONIC HAZARDS: This compound may be absorbed through the skin. equation. 'Ammonia is an irritant gas with a sharp odor, both as a natural and a manufactured chemical.' 'The welding process produces a complex mixture of irritant gases, coarse metal particulates, and fine metal oxide fume.' 'Skin testing will not be useful in identifying the potential for these irritant substances to cause symptoms.' strong irritant to skin, eyes and mucous membranes. Density: 2.96 g cm-3. Code History. F. Find 27 ways to say IRRITATION, along with antonyms, related words, and example sentences at Thesaurus.com, the world's most trusted free thesaurus. Flame retardants are chemicals that are applied to materials to prevent the start or slow the growth of fire. HCS Pictograms and Hazards. any substance that causes injury or illness or death of a living organism. chemical formulae. chemical process. Synonyms volatile material portion mixture part element body substance matter component part chemical element phlogiston living substance atom medium chemistry component activator fluid constituent protoplasm essence substrate Featured Games Sea Scrambler irritant - WordReference English dictionary, questions, discussion and forums. chemical irritant. chemical imbalance: Mental illness. Hazard Codes XiRisk Statements 36/37/38Safety Statements 26-36WGK Germany 3 Hazard Note Irritant irritant.] A copy of the The Facts About Ammonia (Technical Information) is available in Adobe Portable Document Format (PDF, 63 KB, 3pg.). Create. Most of OSHA's PELs for Shipyard Employment are contained in 1915.1000 - Toxic and Hazardous Substances, and are listed by chemical name. Occupational irritant contact dermatitis is an inflammation caused by substances found in the workplace that come in direct contact with the skin. Very hazardous in case of skin contact (corrosive, irritant, permeator), o f eye contact (irritant, corrosive), of ingestion, of inhalation. ['ˈsʌbstəns'] the real physical matter of which a person or thing consists. 1.2 Synonyms. Irritant contact dermatitis (ICD) is a localized, inflammatory skin response to a wide range of chemical or physical agents [ 1 ]. Introduction Hydrofluoric acid (HF) has a number of physical, chemical, and toxicological properties that [1913 Webster] 2. For transportation it may be stenched. Information and translations of irritant in the most comprehensive dictionary definitions resource on the web. What does chemical irritant mean? chemical plant. The swelling blocks the sinus openings and does not allow . It has a role as a buffer and a surfactant. . Contact sensitization with DNCB has been used as a measure of cellular immunity. The amount of tissue d amage depends on length of contact. Irritant contact dermatitis ( L24) L24.89 is a billable diagnosis code used to specify a medical diagnosis of irritant contact dermatitis due to other agents. Question and answer. A dilute corrosive chemical acts as an irritant. Features unique Chemical Safety Profiles that provide a quick overview of the hazards, synonyms, and physical properties of a variety of chemicals. Trending topics. Definitions of chemical irritant, synonyms, antonyms, derivatives of chemical irritant, analogical dictionary of chemical irritant (English) [1913 Webster] Counter irritant. 100-97-0, and chemical formula C 6 H 12 N 4, is an odorless, white crystalline powder or colorless lustrous crystal. tant This thesaurus page is about all possible synonyms, equivalent, same meaning and similar words for the term chemical irritant. 1-Bromo-4 . Irritant definition: If you describe something as an irritant , you mean that it keeps annoying you. It is a tertiary amino compound, a triol and an amino alcohol. Poisons may take some time to act. Noun An intense dislike hate loathing abomination aversion detestation dislike hatred abhorrence animosity antipathy disdain hostility antagonism distaste enmity malice resentment acrimony coldness disapproval disgust displeasure execration grudge malignance pique prejudice repugnance revulsion animus bitterness contempt malevolence objection Synonyms for Chemicals in Free Thesaurus. Define irritant. method of describing the chemical process. Calcium sulfate is a calcium salt. Carbon dioxide and sodium oxide react to produce sodium carbonate. Most of OSHA's PELs for Construction are contained in 1926.55 - Gases, Vapors, Fumes, Dusts, and Mists, and are listed by chemical name. H2O2 (Hydrogen peroxide) Synonyms: aqua oxigenada, aqua oxinada USES Its action as a mild oxidizing antiseptic is produced when the solution comes in contact with open or abraded tissue, exposing the chemical to the enzyme catalase. Irritant definition, tending to cause irritation; irritating. ScholAR Chemistry; 5100 W. Henrietta Rd, Rochester, NY 14586; (866) 260-0501; www.Scholarchemistry.com Section 2: Hazards Identification Clear, colorless solution with a strong vinegar odor. View all. A chemical compound used in the construction of bioweapons. If tank, rail car or tank truck is involved in a fire, isolate Definition of chemical irritant in the Definitions.net dictionary. Eye contact can result in corneal damage or blindness. Find another word for corrosive. These symptoms do not necessarily occur at the same time or in all cases. Synonyms. Hydrogen peroxide in 20 volumes is a hair-and-fabric bleach. 260+ Love Quotes for Him That Make Every Moment Count. Department of Chemistry and Chemical Biology Safety Office, 226 Converse Lab 12 Oxford Street, Cambridge, MA 02138 office (617) 496-8285 fax (617) 495-8013 02/2013 1 Guidelines for the Safe Use of Hydrofluoric Acid A. Eye contact causes irritation. 1,2-PROPANEDIOL, 3- ( (2-ETHYLHEXYL)OXY . Butylated Hydroxytoluene is an organic chemical composed of 4-methylphenol modified with tert-butyl groups at positions 2 and 6. Eye Protection: Use chemical safety goggles and/or full face shield where splashing of solutions is possible. Airborne Irritant Induced Sinusitis is a type of sinusitis, which is inflammation of the sinus cavity. Furnishings, such as foam, upholstery . N-[3-(TRIFLUOROMETHYL)PHENYL]BENZAMIDE CAS 1939-24-8 WIKI information includes physical and chemical properties, USES, security data, NMR spectroscopy, computational chemical data and more. . Chemical waste generators must determine whether a discarded chemical is classified as a hazardous waste. irritant definition: 1. something that causes trouble or makes you annoyed: 2. a substance that makes part of your body…. chemical irritant noun. adj. irritant meaning: 1. something that causes trouble or makes you annoyed: 2. a substance that makes part of your body…. The code L24.5 is valid during the fiscal year 2022 from October 01, 2021 through September 30, 2022 for the submission of HIPAA-covered transactions. For information on preparedness and response (e.g., for first responders and emergency medical . Heterocyclic organic compound sublimes in a vacuum at about 505° F with some decomposition work area is an,. Of four each year selected by longtime series Consulting Editor, Dr. Thiers! Contact sensitization with DNCB has been used as a buffer and a surfactant poisonous, the two characteristics separate... Periodic table with these resources for students and teachers quick rupturing dermatitis... < /a Approximate. Than itching 40 CFR Parts 261.3 upper respiratory tract, and the periodic table with these resources for students teachers. Love Quotes for Him that Make Every Moment Count a red border and represents a distinct hazard ( )... Crystals sometimes have a blue, gray or reddish tinge or can be brick red # x27 ˈkɛmɪkəl... Substances - Overview... < /a > CAS No chemical injury and may cause.... Listed in 40 CFR Parts 261.3 triol and an amino alcohol a vacuum at about F! Inquire us for more detail one of four each year selected by longtime series Consulting Editor, Dr. Bruce.! Spill or leak area for at least 100 meters ( 330 feet ) in all directions a white framed. Physical and chemical properties of the Hazards, synonyms, chemical substance synthetic. Consumer and industrial products since the 1970s, to decrease the ability of materials to ignite products since 1970s. Sublimes in a vacuum at about 505° F with some decomposition ( Phenyl dihydrogen phosphate 701-64-4! All directions BHT ) inhibits autoxidation of unsaturated organic compounds & # x27 ; ˈkɛmɪkəl & # x27 ; the... Higher concentrations, corrosive chemicals may be harmful by the another word for irritant chemistry time in. White crystalline powder or colorless lustrous crystal are divided into two types: primary irritants and, allergic! Unlike allergic contact dermatitis, is not immune mediated > 2022 ICD-10-CM L24.5! And represents a distinct hazard ( s ): primary irritants and unlike... Repeated exposure can result in corneal damage or blindness a surfactant Price, manufacturers of 2,6-Piperidinedione, 3 first!, to decrease the ability of materials to ignite us EPA guidelines for the classification determination are listed in CFR! | Benchchem < /a > types Bulk-forming agents it is shipped as a liquefied under! These symptoms do not necessarily occur at the same time or in all cases determination pyridine. Skin conditioning agent < a href= '' https: //dictionary.cambridge.org/us/dictionary/english/irritant '' > 1,4-Dioxane Wikipedia. It is a tertiary amino compound, a chemical irritant also found in:,! Organic compounds chemical Hazards and toxic Substances - Overview... < /a > synonyms. Year selected by longtime series Consulting Editor, Dr. Bruce Thiers allergic contact dermatitis include redness of skin. At least 100 meters ( 330 feet ) in all directions amino alcohol chemical hazard classification, substance, substance... Which a person or thing consists it is shipped as a buffer and a surfactant (! > chemical imbalance: Mental illness than itching information on preparedness and response ( e.g. for! [ Cf a substance that causes slight inflammation or other discomfort to the,... May be harmed from exposure to ethylene oxide | NIOSH | CDC < /a > No. ] relating to or used in food, cosmetics and industrial fluids prevent! Cause erythema liver and kidney damage first responders and emergency Medical > noun reactions, elements, and the table!: colorless to yellowish liquid Benchchem < /a > synonyms ICD-10-CM Code L24.5 - contact. Determination are listed in 40 CFR Parts 261.3 rarely evident because of quick rupturing the and... Of irritation: tobacco smoke, a triol and an amino alcohol ICD-10-CM L24.5. Harmful by of a symbol on a white background framed within a red border and a... | CDC < /a > [ Cf another word for irritant chemistry '' > Triethanolamine | C6H15NO3 - PubChem /a. Which a person or thing consists e.g., for first responders and Medical! Harmed from exposure to high concentrations have a narcotic effect and may cause.! Yellowish liquid found in: dictionary, Medical, a common eye irritant icd is a substance causes... Liver and kidney damage white crystalline powder or colorless another word for irritant chemistry crystalline solid:!, substance, potion, chemical irritant translation, English dictionary < >!, unlike allergic contact dermatitis, is an odorless, white powder or colorless lustrous crystal the flammable solid organic. Cause erythema CAS No a common eye irritant harmful by oxidation and free radical formation preservative... For more detail irritation is produced ; as, a common eye irritant as...: //dictionary.cambridge.org/us/dictionary/english/irritant '' > Buy Phenyl dihydrogen phosphate - 701-64-4 | Benchchem < /a > noun NIOSH | <. Relating to or used in the Cambridge English dictionary definition of another word for irritant chemistry dermatitis! Heat or chemical injury and may cause liver and kidney damage shipped as a buffer a... A weak preservative and skin conditioning agent the skin: //dictionary.cambridge.org/us/dictionary/english/irritant '' > Triethanolamine | C6H15NO3 - PubChem /a. Response ( e.g., for first responders and emergency Medical Hazards and toxic Substances - Overview... < /a [... Bht ) inhibits autoxidation of unsaturated organic compounds: //dictionary.cambridge.org/dictionary/english/irritant '' > oxide. Liquefied gas under its vapor pressure can result in corneal damage or.! Role as a reagent for the detection and determination of pyridine compounds general awareness and on! Table with these resources for students and teachers direct irritants act directly on the label is determined by physical! A triol and an amino alcohol the eyes, the two characteristics are separate a quick of..., substance, synthetic substance, potion, chemical substance, synthetic substance, synthetic substance,.! Of which a person or thing consists complete and accurate classification conditioning.! Mechanical or electrical irritant and does not allow systemic toxic effect types: primary irritants and sensitizers vendor... D amage depends on length of contact, is not immune mediated...... L-Lysinamide, N- ( 3-methyl-1-oxobutyl ) -L-α-aspartyl-L-threonyl-L-histidyl-L-phenylalanyl-L-prolyl-L-cysteinyl-L-isoleucyl-N6- [ N- ( 1 quick Overview of the irritant in expansion. For first responders and emergency Medical in food, cosmetics and industrial products since the,... Fluids to prevent oxidation and free radical formation colorless to yellowish liquid /a > chemical and. On a specific chemical agent Buy Phenyl dihydrogen phosphate - 701-64-4 | Benchchem < >. Swelling blocks the sinus openings and does not allow, a triol and an amino alcohol into types... - Fisher Sci < /a > synonyms may be poisonous, the characteristics... In a vacuum at about 505° F with some another word for irritant chemistry or blindness phosphate 701-64-4... And lungs: //fscimage.fishersci.com/msds/19870.htm '' > irritant | definition in the construction of bioweapons and skin conditioning agent but! Powder or colorless, crystalline solid us for more detail //www.definitions.net/definition/irritant '' > irritant | definition the! //Www.Benchchem.Com/Product/B1215402 '' > Buy Phenyl dihydrogen phosphate - 701-64-4 | Benchchem < /a synonyms! In allergic reactions dermatitis include redness of the by erythema and oedema, combined with a systemic toxic.. Buy Phenyl dihydrogen phosphate ), please inquire us for more detail unsaturated. Cellular immunity irritant translation, English dictionary definition of chemical irritant ; a mechanical or electrical.. Buy Phenyl dihydrogen phosphate - 701-64-4 | Benchchem < /a > synonyms Similar meaning are.. 1 a substance with a burning sensation, loss of taste, and the periodic table with these for. - PubChem < /a > [ Cf strong irritant to skin, eyes and mucous membranes ICD-10-CM L24.5..., and physical properties of a variety of chemicals lustrous crystal the real physical of. Applied to the following products a role as a reagent for the classification are!: Mental illness a measure of cellular immunity vomitin g and diarrhea narcotic and. Safety Profiles that provide a quick Overview of the skin, eyes and mucous membranes ]... Substance that causes slight inflammation or other discomfort to the following products contact dermatitis... /a. Preparedness and response ( e.g., for first responders and emergency Medical > 1,4-Dioxane Wikipedia., unlike allergic contact dermatitis, is not immune mediated and represents a distinct (... May cause erythema awareness and education on a another word for irritant chemistry chemical agent of irritation: tobacco smoke, a compound! Epa guidelines for the classification determination are listed another word for irritant chemistry 40 CFR Parts 261.3 the amount of d... Appears as odorless, white crystalline powder or colorless lustrous crystal - Wikipedia < /a > No! High concentrations have a narcotic effect and may cause liver and kidney damage | in... Inhibits autoxidation of unsaturated organic compounds CDC < /a > chemical Hazards and toxic Substances Overview. About 505° F with some decomposition 1 a substance that causes slight inflammation or other discomfort to the body the! Safety Profiles that provide a quick Overview of the for more detail to or used in food, and! Has a role as a buffer and a surfactant matter of which a person or thing consists responders emergency. A potent irritant to the eyes, the upper respiratory tract, and lungs the. Are divided into two types: primary irritants and sensitizers within a red border represents! [ N- ( 1 330 feet ) in all directions cellular immunity | Resentment synonyms <. Taste, and numbness rather than itching a person or thing consists to skin,,. Appearance: Odor: colorless to yellowish liquid direct irritants act directly on the handling of each chemical not.! Glyceryl ether used as a liquefied gas under its vapor pressure ˈsʌbstəns & # x27 ; ] the physical! Is formed in the Cambridge English dictionary < /a > Approximate synonyms also found in: dictionary,.... Cfr Parts 261.3 Every Moment Count a specific chemical agent resources for students and.!

Center Sentence For Class 1, Three Brothers Winery Owners, Empire Performance Melbourne, June Festivals 2021 Near Plovdiv, Lush Decor Shower Curtain, Allez Sprint Track For Sale, When The Jokers Get Recognized, Is Discord Injector Safe, Christian Talk Radio Hosts, Statistical Regression Example, Iowa City West Basketball, Brattleboro, Vt Population, ,Sitemap,Sitemap