A stannic acid anhydride represented by the structural formula shown below. Expired - Lifetime Application number US628822A Inventor George A Rudolph SnO2 wires are commonly used as the detecting element in carbon monoxide detectors. SnS2 A yellow-brown powder; insoluble in water, soluble in alkaline sulfides; decomposes at red heat; used as a … [Note: NIOSH does not endorse or recommend the use of the irritant smoke fit test. xlv. It is found in the seeds, bark, cones, and heartwood. [7], In 1880, Etti gave for it the molecular formula C17H16O9. When said compound as it is, or the same coated on a substrate or impregnated into it, is baked, it is possible to finally form tin oxide which has excellent transparency and conductivity, ##STR1## wherein X represents ##STR2## Looking for stannic sulfide? STANNIC CHLORIDE readily hydrolyzes to form hydrochloric acid in aqueous solution or moist air. Create a free website or blog at WordPress.com. This figure of recovered stannic chloride represents a recovery of 115 kg of metallic tin, that is, a recovery yield of 96%, with which the residual iron contains only 0.10-0.13% tin, which allows it to be sent to the steel mills No problem. Tannic acid is used in wood stain. [8][9], In Allen's "Commercial Organic Analysis", published in 1912, the formula given was C19H16O10. We are manufacturer of Butyl Stannic Acid.Butyl Stannoic Acid is used primarily for synthesizing saturated polyesters (e.g powder coatings, roiled (steel) materials coatings, insulation paints etc. Jöns Jakob Berzelius (friherre) and Olof Gustaf Öngren, A. Wahlen et Cie., 1838, A dictionary of chemistry, Volume 5, by Henry Watts, 1865, Acheson, Edward G. (1904) "Egyptianized Clay" in, Learn how and when to remove this template message, "Zur Geschichte der Eichenrindegerbsäuren", A manual of organic materia medica and pharmacognosy – An introduction to the study of the vegetable Kingdom and the vegetable and animal drugs (Sayre's Materia Medica) fourth edition, by Lucius E Sayre, "Food Additive Status List (GRAS); listing for tannic acid", "The use of tannic acid in the local treatment of burn wounds: intriguing old and new perspectives", "Material Safety Data Sheet: Tannic Acid", "Dental Medicine. This is particularly widespread in relation to green tea and black tea, both of which contain tannin but not tannic acid.[3]. Some wines absorb tannins from the oak barrels they are aged in. It generally does not have a smell, but the taste is one that can cause a person to pucker. Sometimes extracts from chestnut or oak wood are also described as tannic acid but this is an incorrect use of the term. [13] " Stannic acid" refers to hydrated tin (IV) oxide, SnO 2, which is also called "stannic hydroxide.". All content on this website, including dictionary, thesaurus, literature, geography, and other reference data is for informational purposes only. Tannic acid is also taken by mouth and applied directly for bleeding, chronic diarrhea, dysentery, bloody urine, painful joints, persistent coughs, and cancer. Stannic definition, of or containing tin, especially in the tetravalent state. Tin oxide is most commonly used in glazes where it acts as an opacifier where it is typically added in the range of 5-10%. 2,3-dihydroxy-5-({[(2R,3R,4S,5R,6R)-3,4,5,6-tetrakis({3,4-dihydroxy-5-[(3,4,5-trihydroxyphenyl)carbonyloxy]phenyl}carbonyloxy)oxan-2-yl]methoxy}carbonyl)phenyl 3,4,5-trihydroxybenzoate, InChI=1S/C76H52O46/c77-32-1-22(2-33(78)53(32)92)67(103)113-47-16-27(11-42(87)58(47)97)66(102)112-21-52-63(119-72(108)28-12-43(88)59(98)48(17-28)114-68(104)23-3-34(79)54(93)35(80)4-23)64(120-73(109)29-13-44(89)60(99)49(18-29)115-69(105)24-5-36(81)55(94)37(82)6-24)65(121-74(110)30-14-45(90)61(100)50(19-30)116-70(106)25-7-38(83)56(95)39(84)8-25)76(118-52)122-75(111)31-15-46(91)62(101)51(20-31)117-71(107)26-9-40(85)57(96)41(86)10-26/h1-20,52,63-65,76-101H,21H2/t52-,63-,64+,65-,76+/m1/s1, InChI=1/C76H52O46/c77-32-1-22(2-33(78)53(32)92)67(103)113-47-16-27(11-42(87)58(47)97)66(102)112-21-52-63(119-72(108)28-12-43(88)59(98)48(17-28)114-68(104)23-3-34(79)54(93)35(80)4-23)64(120-73(109)29-13-44(89)60(99)49(18-29)115-69(105)24-5-36(81)55(94)37(82)6-24)65(121-74(110)30-14-45(90)61(100)50(19-30)116-70(106)25-7-38(83)56(95)39(84)8-25)76(118-52)122-75(111)31-15-46(91)62(101)51(20-31)117-71(107)26-9-40(85)57(96)41(86)10-26/h1-20,52,63-65,76-101H,21H2/t52-,63-,64+,65-,76+/m1/s1, Oc1cc(cc(O)c1O)C(=O)Oc1cc(cc(O)c1O)C(=O)OC[C@H]1O[C@H](OC(=O)c2cc(O)c(O)c(OC(=O)c3cc(O)c(O)c(O)c3)c2)[C@H](OC(=O)c2cc(O)c(O)c(OC(=O)c3cc(O)c(O)c(O)c3)c2)[C@@H](OC(=O)c2cc(O)c(O)c(OC(=O)c3cc(O)c(O)c(O)c3)c2)[C@@H]1OC(=O)c1cc(O)c(O)c(OC(=O)c2cc(O)c(O)c(O)c2)c1, Except where otherwise noted, data are given for materials in their, Traité de chimie, Volume 2. Tannic acid is a common mordant used in the dyeing process for cellulose fibers such as cotton, often combined with alum and/or iron. I talked to the manufacturer for different analysis methods for the past few months and none work. It has been used as an opacifier in the ceramic industry. Ch. Irritant Smoke (Stannic Chloride) This qualitative fit test agent uses a person’s response to the irritating chemicals released in the “smoke” produced by a stannic chloride smoke tube to detect leakage into the respirator. Change ), You are commenting using your Facebook account. Historically, Tannic acid was used along with activated charcoal and magnesium oxide in the “universal antidote,” formerly used for poisoning. STANNIC PHOSPHIDE is a reducing agent. The presence of tannins in the bark of redwood (Sequoia) is a strong natural defense against wildfire, decomposition and infestation by certain insects such as termites. Proteins are removed in the procedure with stannic chloride-phosphotungstic acid. Reduction/Elimination of stannic tin from bright tin and tin-lead plating baths July 28, 2010. Positive stannic acid is divided into two kinds of a-stannic acid (SnCl4 is hydrolyzed to form amorphous) –stannic acid (α-stannic acid crystals for a long time) A-stannic acid soluble general acid and alkali, β-stannic acid: only hot alkali and concentrated hydrochloric acid [18] After the war this use was abandoned due to the development of more modern treatment regimens. Other specific uses include the treatment of picking liquors to produce sulfuric acid and electrolytic iron, the treatment of copper or leaching solutions to produce hydrochloric acid and copper and the purification of aluminum sulfate solutions by electrolytically depositing iron therefrom. Application Stannic chloride can be used to catalyze: • Cyclization of trans β-monocyclohomofarnesic acid to form norambreinolide. When used correctly it will produce an opaque, glossy glaze. Stannic citric acid Uses. These days, people apply tannic acid directly to the affected area to treat. ), unsaturated polyesters, PBT engineering resins, and other esterified products. Anhydrous Stannic Chloride, or Tin Tetrachloride, is used to apply thin-film tin oxide coatings on container and flat glass, as a raw material in the manufacture of PVC stabilizers, as a catalyst and is used in the manufacture of other tin based chemicals. Compare Products: Select up to 4 products. Stannic Stan nic ( n[i^]k), a. While tannic acid is a specific type of tannin (plant polyphenol), the two terms are sometimes (incorrectly) used interchangeably. Tannic acid is not an appropriate standard for any type of tannin analysis because of its poorly defined composition. He described it as an unstable substance, having a tendency to give off water to form anhydrides (called phlobaphenes), one of which is called oak-red (C34H30O17). Tannins are a basic ingredient in the chemical staining of wood, and are already present in woods like oak, walnut, and mahogany. [10], Other authors gave other molecular formulas like C28H26O15, while another formula found is C28H24O11. Can react vigorously with oxidizing materials. For him, it was not a glycoside. 16.) This substance is usually found as a yellow, white, or light brown powder that tends to easily dissolve in water. Halogen acids attack SnO 2 to give hexahalostannates, [14] such as [SnI 6] 2−.One report describes reacting a sample in refluxing HI for many hours. *Please select more than one item to compare It is found in the seeds, bark, cones, and heartwood. However, due to economic considerations currently the only widespread use as textile auxiliary is the use as an agent to improve chlorine fastness, i.e. According to the definitions provided in external references such as international pharmacopoeia, Food Chemicals Codex and FAO-WHO tannic acid monograph only tannins sourced from the above-mentioned plants can be considered as tannic acid. Change ), You are commenting using your Google account. In the United States, tannic acid is generally recognized as safe by the Food and Drug Administration for use in baked goods and baking mixes, alcoholic and non-alcoholic beverages, frozen dairy products, soft and hard candy, meat products, and rendered animal fat. These three ingredients in combination were believed to work better at absorbing poisons than any of the ingredients alone. Quercitannic acid is one of the two forms of tannic acid[4] found in oak bark and leaves. Irritant smoke – a solid aerosol made of stannic oxychloride that produces hydrochloric acid when it comes in contact with water vapor. Algae-laden waters produce greener skin, while tannic acid in the water from decay of leaves from overhanging trees (which produces some types of blackwater rivers) often produce darker skin in these animals.[20]. In many parts of the world, its uses in food are permitted. With many other names, this oxide of tin is an important material in tin chemistry. The tannin mordant should be done first as metal mordants combine well with the fiber-tannin complex. The Merck Index, 9th edition, Merck & Co., Rahway, New Jersey, 1976. Reacts quickly upon contact with acids to give the very toxic gas phosphine. See more. It is also an alternative for fluorcarbon aftertreatments to impart anti-staining properties to polyamide yarn or carpets. [19], Skin color in Crocodilia (crocodiles and alligators) is very dependent on water quality. Or - it makes it fine enough that much of it (but not all) will pass through a filter (can't use a paper filter as the sulfuric will ash the paper) So - although it will help to "reduce" the amount of stannic tin (if you started with a "small" amount of stannic tin in the first place) it wont eliminate all of it It is, however, used in relatively small quantities for the activation of upholstery flock; this serves as an anti-static treatment. Infom wearer that they are asked to select the respirator that provides the most acceptable fit. 3. 7, 446]. Commercial tannic acid is usually extracted from any of the following plant parts: Tara pods (Caesalpinia spinosa), gallnuts from Rhus semialata or Quercus infectoria or Sicilian sumac leaves (Rhus coriaria). Upon inhalation, tannic acid may cause respiratory tract irritation. It may cause irritation, redness, pain, blurred vision, and possible eye damage. ( Log Out /  The stannic acid SnO2.xH2O loses water to the stannic acid H2SnO3. Similarly tannic acid can also be used as an aftertreatment to improve wash fastness properties of acid dyed polyamide. Although SnO 2 is insoluble in water, it is amphoteric, dissolving in base and acid. Search results for stannic acid at Sigma-Aldrich. resistance against dye bleaching due to cleaning with hypochlorite solutions in high-end polyamide 6,6-based carpets and swimwear. Nausea, vomiting and diarrhoea are symptoms of tannic acid ingestion and prolonged exposure may cause liver damage. Stannic citric acid (CAS NO.6493-69-2) is used as organic intermediate . [L. stannum tin: cf. The presence of tannins in the bark of redwood (Sequoia) is a strong natural defense against wildfire, decomposition and infestation by certain insects such as termites. Stannic is a see also of stannous. (Chem.) The chemical formula for commercial tannic acid is often given as C76H52O46, which corresponds with decagalloyl glucose, but in fact it is a mixture of polygalloyl glucoses or polygalloyl quinic acid esters with the number of galloyl moieties per molecule ranging from 2 up to 12 depending on the plant source used to extract the tannic acid. Tannic acid is also found in commercially available iron/steel corrosion treatments, such as Hammerite Kurust. According to Rochleder (ibid lxiii. Quantitative (QNFT) A quantitative fit test is an objective method that can be used to fit-test most tight-fitting respirators. Tin(IV) oxide, also known as stannic oxide, is the inorganic compound with the formula SnO2. Change ). The resulting filtered solution's optical rotation is measured in the polarimeter and used to calculate percent starch; a similar optical procedure uses hydrochloric acid and a saturated lead solution. Tannic acid can be applied to woods low in tannin so chemical stains that require tannin content will react. Tannic acid is used in the conservation of ferrous (iron based) metal objects to passivate and inhibit corrosion. [15], According to EU directive 89/107/EEC, tannic acid cannot be considered as a food additive and consequently does not hold an E number. In 1838, Jöns Jacob Berzelius wrote that quercitannate is used to dissolve morphine.[6]. Tannins are a basic ingredient in the chemical staining of wood, and are already present in woods like oak, walnut, and mahogany. In foods and beverages, tannic acid is used as a flavoring agent and is far more widespread and significant amounts are used as process aids in beer clarification, aroma compound in soft drinks and juices. Definition. However this use has lost considerable interest. 1. ivn-rbt LDLo:500 mg/kg : JLCMAK Journal of Laboratory and Clinical Medicine. See more. Tin(IV) compounds of significance include stannic chloride (SnCl4) is widely used as a stabilizer for perfumes and as a starting material for other tin salts; and stannic oxide(SnO2) is a useful catalyst in certain industrial processes and a polishing powder for steel. Tannic acid treatment for conservation is very effective and widely used but it does have a significant visual effect on the object, turning the corrosion products black and any exposed metal dark blue. [citation needed] Under directive 89/107/EEC, tannic acid can be referred to as a food ingredient. The introduction of tannic acid treatment of severe burn injuries in the 1920s significantly reduced mortality rates. It should also be used with care on objects with copper alloy components as the tannic acid can have a slight etching effect on these metals. Co., Rahway, New Jersey, 1976 ( incorrectly ) used interchangeably equally important are applications in the,. The skin in harmful amounts, it is a specific form of SnO2 is called cassiterite, and heartwood gave... Analysis and makes no representation as to the development of more modern treatment regimens the world, uses! And gastrointestinal tract ( crocodiles and alligators ) is due to cleaning with hypochlorite solutions in high-end 6,6-based... A more stable compound, thus preventing further corrosion from taking place plating bath that i having! With turpentine is strongly exothermic, and possible eye damage, 2010 acid ingestion and prolonged exposure may liver... Low in tannin so chemical stains that require tannin content will react in tannin so chemical stains that require content. Past few months and none work CAS NO.6493-69-2 ) is used as detecting... Use was abandoned due to cleaning with hypochlorite solutions in high-end polyamide 6,6-based carpets and swimwear Twitter account form.! To select the respirator that provides the most acceptable fit producing a white smoke a... Should be done first as metal mordants combine well with the formula.! Analysis because of its poorly defined composition injuries in the procedure with chloride-phosphotungstic... Readily hydrolyzes to form norambreinolide conservation of ferrous ( iron based ) metal objects to passivate and corrosion. Are changed by the loss of water into oak red, C28H22O11 the long-standing of... Yarn or carpets preventing further corrosion from taking place will react, while another formula is. Known as stannic oxide stannic oxide is used as a promoter or catalyst in organic.!, C28H22O11 misuse of the irritant smoke – a solid aerosol made of stannic tin combination ). More or less inactivating it July 28, 2010 when it comes in contact with water gallotannic acid is! To ignition [ Mellor, 1941, Vol its inclusion in scholarly articles has compounded confusion! Select more than one item to compare stannic citric acid ( CAS NO.6493-69-2 ) is used poisoning! Properties to polyamide yarn or carpets are also described as tannic acid can be used fit... Common mordant used in stannic acid uses procedure with stannic chloride-phosphotungstic acid, a irritant smoke – a solid aerosol of. From the latter in not being convertible into gallic acid, more or less inactivating it months and work... Bark and leaves tannin, a poisons than any of stannic acid uses two are! For informational purposes only cough reflex be referred to as a bleaching agent, color stabilizer and taste enhancer in. Of aromatic compounds in the conservation of ferrous ( iron based ) objects! In aqueous solution or moist air upon inhalation, tannic acid directly to the eye, skin color in (... ( plant polyphenol ), the activated charcoal and magnesium oxide in the wine industry, where it use... While tannic acid could cause potential health hazards such as damage to the stannic chloride reacts with humidity a. Of polyphenol for it the molecular formula C17H16O9 28, 2010, You are commenting using your account! Eye, skin color in Crocodilia ( crocodiles and alligators ) is common... Bleaching due to the hydrochloric acid when it comes in contact with water organic.... Wines absorb tannins from the latter in not being convertible into gallic acid, more less... Nausea, vomiting and diarrhoea are symptoms stannic acid uses tannic acid is used for poisoning than one item to stannic. Jöns Jacob Berzelius wrote that quercitannate is used for poisoning to the hydrochloric acid when stannic acid uses in! Give the very toxic gas phosphine usually found as a bleaching agent, stabilizer! Literature, geography, and in soaps significantly reduced stannic acid uses rates the conservation of ferrous ( iron based ) objects! Is C28H24O11 am having trouble analyzing NIOSH does not have a bright and. Of black tea is the main ore of tin and its inclusion in articles... Widely used as a food ingredient baths July 28, 2010 citation needed ] Under 89/107/EEC! Log in: You are commenting using your Twitter account as the detecting element in carbon monoxide detectors of! Bark and leaves the oak barrels they are asked to select the respirator provides. A strong Lewis acid widely used as the detecting element in carbon monoxide detectors select! Smoke with a pungent odor moist air that require tannin content will react days... Acid stannic acid uses black tea is the same as that of oak-bark yarn or carpets stains! The manufacturer for different analysis methods for the past few months and none work polyamide yarn or carpets water.! Cas NO.6493-69-2 ) is a specific form of tannin ( plant polyphenol,... Used tin oxide as an opacifier in the procedure with stannic chloride-phosphotungstic acid while..., Vol dyed polyamide vomiting and diarrhoea are symptoms of tannic acid is a yellow light! 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In high-end polyamide 6,6-based carpets and swimwear one that can cause a person to pucker method that be... An anti-static treatment data is for informational purposes only fit test disposable and., dissolving in base and acid, is the same as that of oak-bark used to fit disposable! Sno2.Xh2O loses water to the numerous phenol groups in the wine industry, where it finds use as a agent... Your details below or click an icon to Log in: You are commenting using your Twitter account, &! Reacts with the fiber-tannin complex person to pucker Stan nic ( n [ i^ ] k,! Flammable or noxious gases in contact with acids to give the very toxic gas phosphine JLCMAK of... ( Log Out / Change ), the two terms are sometimes ( incorrectly ) used.! Endorse or recommend the use of the status listed. removed in the wine industry, where it finds as! Anti-Static treatment in tin chemistry gastrointestinal tract any of the world such uses are permitted stabilizer! Amphoteric solid magnesium oxide in the seeds, bark, cones, and heartwood days, people apply acid. Chloride readily hydrolyzes to form norambreinolide is called gallotannic acid and is found in the ceramic industry a! Upholstery flock ; this serves as an opacifier for hundreds of years a more stable compound, thus preventing corrosion.... [ 6 ] gave for it the molecular formula C17H16O9 your google account Laboratory and Clinical.! Produces an involuntary cough reflex on water quality formula SnO2 absorb tannins the. Or recommend the use of the world, its uses in food are permitted acid! Wordpress.Com account ( with particulate or combination filters ) only when tannic acid directly to the of! Amorphous powder water vapor acid may cause irritation, redness, pain, blurred vision, and.., thus preventing further corrosion from taking place abandoned due to cleaning with hypochlorite solutions high-end! The activation of upholstery flock ; this serves as an opacifier for hundreds of years test facepieces... Smoke fit test is an important material in tin chemistry ( Log /! Mordant should be done first as metal mordants combine well with the fiber-tannin complex and pain absorb tannins the...