98% , 117-62-4
CAS NO.：117-62-4
Empirical Formula: C10H9NO6S2
Molecular Weight: 303.31
MDL number: MFCD00021512
EINECS: 204-201-6
| Pack Size | Price | Stock | Quantity |
| 1g | RMB203.20 | In Stock |
|
| 5g | RMB769.60 | In Stock |
|
| 10g | RMB1300.00 | In Stock |
|
| 25g | RMB2340.00 | In Stock |
|
| 100g | RMB6838.40 | In Stock |
|
| others | Enquire |
PRODUCT Properties
| Boiling point: | 205.8°C (rough estimate) |
| Density | 1.6329 (rough estimate) |
| refractive index | 1.7330 (estimate) |
| storage temp. | 2-8°C |
| pka | -0.51±0.40(Predicted) |
| Water Solubility | soluble |
| LogP | -1.85 |
Description and Uses
2-Aminonaphthalene-1,5-disulfonic acid [117-62-4]. 5-sulfo-Tobias acid, C10H9NO6S2, Mr 303.32, is purified by crystallization of the dipotassium salt from water. Alkali fusion results in formation of 2-amino-5-hydroxynaphthalene-1-sulfonic acid. Sulfonation (40 % oleum, 100℃) gives 2-aminonaphthalene-1,5,7-trisulfonic acid. Heating with aqueous sulfuric acid produces 2-aminonaphthalene-5- sulfonic acid. The diazo compound is converted to 2-diazo-1-hydroxynaphthalene-5-sulfonic acid on treatment with alkaline hypochlorite.
?As a diazo component in orange and red azo reactive dyes, 2-Amino-1,5-naphthalenedisulfonic acid gives more bathochromic shades than Tobias acid.
