PolytropeblueB
Chrome Azurol S
CAS: 1667-99-8
Molecular Formula: C23H13Cl2Na3O9S
PolytropeblueB - Names and Identifiers
| Name | Chrome Azurol S |
| Synonyms | C.I. 43825 Mordantblue ChomeazurolS Chromazurol S PolytropeblueB Mordant Blue 29 Chrome Azurol S Chrome Cyanine BLA C.I. Mordant Blue 29 Chrome Azurol S, pure CHROMAZUROL S (C.I. No 43825 ) C.I. Mordant Blue 29, trisodium salt (8CI) CHROME AZUROL S INDICATOR FOR METAL TITRATION Benzoic acid, 5-(3-carboxy-5-methyl-4-oxo-2,5-cyclohexadien-1-ylidene)(2,6-dichloro-3-sulfophenyl)methyl-2-hydroxy-3-methyl-, trisodium salt trisodium 5-[(E)-(3-carboxylato-5-methyl-4-oxocyclohexa-2,5-dien-1-ylidene)(2,6-dichloro-3-sulfonatophenyl)methyl]-2-hydroxy-3-methylbenzoate trisodium 5-[(Z)-(3-carboxylato-5-methyl-4-oxocyclohexa-2,5-dien-1-ylidene)(2,6-dichloro-3-sulfonatophenyl)methyl]-2-hydroxy-3-methylbenzoate |
| CAS | 1667-99-8 |
| EINECS | 216-787-0 |
| InChI | InChI=1/C23H16Cl2O9S.3Na/c1-9-5-11(7-13(20(9)26)22(28)29)17(12-6-10(2)21(27)14(8-12)23(30)31)18-15(24)3-4-16(19(18)25)35(32,33)34;;;/h3-8,26H,1-2H3,(H,28,29)(H,30,31)(H,32,33,34);;;/q;3*+1/p-3/b17-12-;; |
| InChIKey | FUIZKNBTOOKONL-NDOZRWCBSA-K |
PolytropeblueB - Physico-chemical Properties
| Molecular Formula | C23H13Cl2Na3O9S |
| Molar Mass | 605.28 |
| Melting Point | Dye content, 50% |
| Water Solubility | Soluble in water |
| Appearance | Red cystal |
| Color | Dark-brown |
| Odor | Odorless |
| BRN | 4110655 |
| pKa | pK1:2.45;pK2:4.86;pK3:11.47 (25°C) |
| Storage Condition | Room Temprature |
| Stability | Stable. Incompatible with strong oxidizing agents. |
| Sensitive | Easily absorbing moisture |
| MDL | MFCD00001615 |
| Use | Metal titration indicator for spectrophotometric determination of metals such as beryllium and aluminum and rare earth metals. Determination of serum iron. The complex of beryllium is used for the spectrophotometric determination of fluoride ions. |
PolytropeblueB - Risk and Safety
| Hazard Symbols | Xi - Irritant |
| Risk Codes | 36/37/38 - Irritating to eyes, respiratory system and skin. |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36 - Wear suitable protective clothing. |
| WGK Germany | 3 |
| HS Code | 29189900 |
PolytropeblueB - Reference
| Reference Show more | 1. Zhang Lin, Chen Yanhong, Wang Xueyan, et al. Growth-promoting Effect of Endophytic Bacteria in Panax notoginseng Plants [J]. Journal of Dalian University of Technology 2018 037(004):244-248. 2. Lu Hang. Investigation and Study on Use of Hanging White Blocks, Borax and Alum in Pastery Products in Changchun City in 2017-2019 [D]. Jilin Agricultural University. |
PolytropeblueB - Introduction
Easily soluble in water, brown-yellow solution, soluble in alcohol, the solution is reddish brown.
Last Update：2022-10-16 17:14:17
PolytropeblueB - Reference Information
| Overview | Chrome azurol S, also known as 3 "-sulfo -2", 6 "-dichloro -3,3 '-dimethyl-4-hydroxyfuchsin ketone -5,5'-dicarboxylic acid trisodium salt; Alias: mordant Blue 13; Mordant blue 29. Appearance of red-brown powder, dissolved in water after a brown solution, slightly soluble in water, the aqueous solution was red-brown, the maximum absorption wavelength of 458nm, irritating. Chrome azurol S is a triphenylmethane acid dye, which is widely used in analytical chemistry. |
| Product description | mordant blue can form colored complex with aluminum, beryllium, copper, iron, zirconium, vanadium plasma, it is therefore useful as a developer for the colorimetric determination of these ions. The reagent forms a variety of 1:1, 1:2 and 1:3 complexes with aluminum at higher acidity, with a 1:2 complex being the most stable. Since the absorbance of the reagent itself and its complex with aluminum is strongly dependent on the pH of the solution, the control of the pH during the measurement is of particular importance. Generally, a pH of 5 to 5.5 and an absorption wavelength of 550 nm are used as colorimetric measurement conditions for aluminum. In addition, it can be generally used as a metal indicator in the Complexometric titration of aluminum, titanium and zirconium. |
| Application | Chrome azurol S can be used as an indicator for chelate titration of aluminum, calcium, iron, nickel and thorium. Colorimetric Determination of aluminium, cerium, cobalt, chromium, copper, iron, gallium, hafnium, indium, lanthanum, manganese, molybdenum, nickel, palladium, rhodium, scandium, thorium, titanium, vanadium, yttrium, spatula, zirconium plasma and ammoniates. Colorants for fibers, plastics, coatings and adhesives. |
| preparation | (I), sulfonation reaction of fuming sulfuric acid and acid medium bleaching Blue B: equipped with a stirrer, a thermometer, a feeding port, 30% G of fuming sulfuric acid containing 20 ~ by weight of sulfur trioxide is added to the ml four-port round bottom flask of the condenser, stirring is started, and G of acid medium bleaching B is gradually added, and the reaction temperature is controlled at 85 ℃, after the addition was completed, stirring was continued for 1 hour, and the temperature was maintained at 103 ° C. Until the sulfonation reaction was complete (I. E., 2 drops of water solution until red). After cooling to 50 ° C with stirring, the reaction solution was poured into a 10L plastic bucket containing 2.5 of ice, 20% (weight) of brine was added, and salting out with stirring to produce a purple-red precipitate, after standing for 2 hours, the mixture was filtered, washed twice with 20% by weight of brine, filtered and dried at 75 ° C. To obtain 110g of the sulfonated product. Extraction of sulfonated product with anhydrous ethanol: the sulfonated product was refluxed with 1200g of anhydrous ethanol for 24 hours, filtered, evaporated, concentrated and dried under reduced pressure to 92kPa to obtain 80g of sulfonated product. (Iii) neutralization to salt formation: to a mixture of 15% G of deionized water and 80g of sulfonated product, 3W eight percent aqueous sodium hydroxide solution was added dropwise with stirring to adjust the pH to 5-6.5, 33g of 15% (by weight) aqueous sodium hydroxide solution were consumed, all of which were dissolved and filtered. The filtrate was concentrated under reduced pressure and dried to obtain 80g of Chrome azurol s product with a yield of 67% and a purity of 75%, the pH value in water is equal to 6~6.5, the maximum absorption wavelength in water is 428nm ~ 432nm, the extinction coefficient of dry molecules is more than or equal to 11000, the sulfate is less than or equal to 44%, and the loss on drying at 105 ℃ is less than or equal to 3.8%. |
| Application | metal titration indicator for the spectrophotometric determination of beryllium, aluminum and other metals and rare earth metals. Determination of serum iron. The complex of beryllium is used for the spectrophotometric determination of fluoride ions. indicator for chelating titration of aluminum, calcium, iron, nickel and thorium; Spectrophotometric determination of aluminum, beryllium, cerium, cobalt, chromium, copper, iron, gallium, hafnium, indium, lanthanum, manganese, molybdenum, nickel, palladium, rhodium, scandium, thorium, titanium, vanadium, yttrium, zinc, zirconium and other metal ions and fluoride |
| Color index | 43825 |
| EPA chemical substance information | information is provided by: ofmpeb.epa.gov (external link) |
Last Update：2024-04-09 15:16:40
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