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| | 2-Amino-1,4-benzenedisulfonic acid Basic information |
| | 2-Amino-1,4-benzenedisulfonic acid Chemical Properties |
| Melting point | >300°C | | Boiling point | 497.5℃[at 101 325 Pa] | | density | 1.569 (estimate) | | refractive index | 1.5500 (estimate) | | storage temp. | Keep in dark place,Inert atmosphere,Room temperature | | solubility | Aqueous Acid (Slightly), Water (Slightly) | | pka | -1.15±0.50(Predicted) | | form | Solid | | color | White to Off-White | | Water Solubility | Slightly soluble in water. | | LogP | -3.43 at 25℃ | | CAS DataBase Reference | 98-44-2(CAS DataBase Reference) | | EPA Substance Registry System | 2-Amino-1,4-benzenedisulfonic acid (98-44-2) |
| | 2-Amino-1,4-benzenedisulfonic acid Usage And Synthesis |
| Chemical Properties | off-white powder | | Uses | Aniline-2,5-disulfonic acid is used as pharmaceutical intermediate. 2-Amino-1,4-benzenedisulfonic acid is used as an intermediate for dyes; 2-Amino-1,4-benzenedisulfonic acid is converted to triazine derivatives, which are intermediates in the manufacture of dyes and optical brighteners. | | Production Methods | 2-Amino-1,4-benzenedisulfonic acid is obtained by sulfonating metanilic acid in 100% sulfuric acid with 50% oleum at 160 ℃ (5 – 6 h); the sulfonation mixture is diluted with water, lime is added, and the resulting calcium sulfate is removed; the product is then precipitated with excess concentrated hydrochloric acid in hot solution; yield 90 – 91%
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| | 2-Amino-1,4-benzenedisulfonic acid Preparation Products And Raw materials |
| Raw materials | Sodium chloride-->FUMING SULFURIC ACID-->Metanilic acid-->Nicotinic acid | | Preparation Products | Reactive Blue 14-->Reactive Orange 1-->Reactive blue 40-->1,4-Benzenedisulfonic acid, 2-[[4-[[4-[(2,4-diamino-5-nitrophenyl)azo]-6-sulfo-1-naphthalenyl]azo]-1-naphthalenyl]azo]-, trisodium salt-->tetrasodium 2-[[4-[[4-[[1-hydroxy-6-(phenylamino)-3-sulphonato-2-naphthyl]azo]-7-sulphonato-1-naphthyl]azo]-1-naphthyl]azo]benzene-1,4-disulphonate-->pentasodium 3-[[4-[[4-[[4-chloro-6-[(3-sulphonatophenyl)amino]-1,3,5-triazin-2-yl]amino]-2,5-dimethylphenyl]azo]-2,5-disulphonatophenyl]azo]-4-hydroxy-5-(phenylamino)naphthalene-2,7-disulphonate-->Direct Blue 82-->DIRECT BLUE 78-->Reactive Orange 20-->Direct blue 83 (C.I. 34230)-->Benzoic acid, 5-[[4'-[[8-amino-7-[(2,5-disulfophenyl)azo]-1-hydroxy-5-sulfo-2-naphthalenyl]azo]-3,3'-dimethyl[1,1'-biphenyl]-4-yl]azo]-2-hydroxy-, tetrasodium salt-->Reactive Blue 255-->C.I. Reactive orange 35-->Reactive Black 39-->REACTIVE BLUE 109-->Reactive Orange 113-->C.I. Reactive brown 44-->Reactive brown 45 |
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