4,5-dihydroxybenzene-1,3-disulphonic acid
- CAS No.
- 149-46-2
- Chemical Name:
- 4,5-dihydroxybenzene-1,3-disulphonic acid
- Synonyms
- Tiron free acid;Pyrocatechol-3,5-disulfonic acid;4,5-Dihydroxybenzene-1,3-disulfonic acid;1,2-Dihydroxybenzene-3,5-disulfonic acid;1,2-Dihydroxy-3,5-benzenedisulfonic acid;4,5-dihydroxybenzene-1,3-disulphonic acid;1,3-Benzenedisulfonicacid, 4,5-dihydroxy-;4,5-dihydroxy- (9ci)1,3-Benzenedisulfonic acid
- CBNumber:
- CB5916940
- Molecular Formula:
- C6H6O8S2
- Molecular Weight:
- 270.23704
- MDL Number:
- MFCD00137788
- MOL File:
- 149-46-2.mol
| Boiling point | 98°C |
|---|---|
| Density | 1.649 (estimate) |
| refractive index | 1.6000 (estimate) |
| pka | pK3:7.66(+2);pK4:12.6(-3) (25°C) |
| FDA UNII | 306J0THJ9U |
4,5-dihydroxybenzene-1,3-disulphonic acid Chemical Properties,Uses,Production
Uses
The disodium salt of 4,5-dihydroxybenzene-1,3-disulphonic acid, which is referred to in the literature as Tiron, serves to detect traces of iron in blood and is used as a reagent for colorimetric determination of Ti4+ and Mo4+. The ability to form water-soluble complex salts, e.g., with antimony, has been exploited in pharmacology. Tiron is claimed to improve the storability of silver halogenide emulsions.
Definition
ChEBI: Chymopapain is an organosulfur compound and a sulfonic acid derivative.
Production Methods
4,5-dihydroxybenzene-1,3-disulphonic acid is produced by sulfonation of pyrocatechol with oleum or by alkali fusion of 2-hydroxy-1,3,5-benzenetrisulfonic acid: 10 kg of the tetrasodium salt of phenoltrisulfonic acid is introduced into 16 kg of sodium hydroxide at about 20 ℃. After adding some water, the temperature is gradually raised to 160 ℃; at the end of the reaction the melt is diluted with water and acidified with sulfuric acid, and sulfur dioxide is driven off. After cooling, precipitated sodium sulfate is removed by filtration and excess sulfate ions are precipitated in fractions. Finally the barium salt, which has poor solubility in cold water, is precipitated.
4,5-dihydroxybenzene-1,3-disulphonic acid Preparation Products And Raw materials
Raw materials
Preparation Products
4,5-dihydroxybenzene-1,3-disulphonic acid Suppliers
| Supplier | Tel | Country | ProdList | Advantage | |
|---|---|---|---|---|---|
| TargetMol Chemicals Inc. | +1-781-999-5354 | support@targetmol.com | United States | 19973 | 58 |
| SHENZHEN PHYSTANDARD BIO-TECH CO.,LTD | 0755-0755-0755-83725350 13380397412 | 3001280422@qq.com | China | 9925 | 58 |
| Shaanxi DIDU pharmaceutical and Chemical Co., Ltd | 15229059051 | 1027@dideu.com | China | 9921 | 58 |
| Supplier | Advantage |
|---|---|
| TargetMol Chemicals Inc. | 58 |
| SHENZHEN PHYSTANDARD BIO-TECH CO.,LTD | 58 |
| Shaanxi DIDU pharmaceutical and Chemical Co., Ltd | 58 |