2-Naphthol-3,6-disulfonic acid disodium salt
Structural formula
| Business number | 03Q6 |
|---|---|
| Molecular formula | C10H6Na2O7S2 |
| Molecular weight | 348.26 |
| label |
3-Hydroxy-2,7-naphthalenedisulfonic acid disodium salt, RG acid, R acid sodium salt, R salt, Disodium 2-naphthol-3,6-disulfonate, 3-Hydroxy-2,7-naphthalenedisulfonic acid, R acid, 2-Naphthol-3,6-disulfonic acid disodium salt, Disodium 3-hydroxy-2,7-naphthalenedisulfonate, R-Acid sodium salt, fluorescent indicator, Aromatic amine reagents |
Numbering system
CAS number:135-51-3
MDL number:MFCD00065915
EINECS number:205-196-3
RTECS number:QJ6477000
BRN number:3643184
PubChem number:24886100
Physical property data
1. Properties: Colorless and shiny filamentous needle-like crystals, the industrial product is gray-white paste.
2. Solubility: soluble in water, ethanol and ether, insoluble in benzene. The aqueous solution has blue-green fluorescence.
Toxicological data
Reproduction data
Oral TDLo: 2mg/kg in female rats from 1 to 20 days after pregnancy;
Ecological data
None
Molecular structure data
None
Compute chemical data
1. Reference value for hydrophobic parameter calculation (XlogP): None
2. Number of hydrogen bond donors: 1
3. Number of hydrogen bond acceptors: 7
4. Number of rotatable chemical bonds: 0
5. Number of tautomers: 3
6. Topological molecule polar surface area 151
7. Number of heavy atoms: 21
8. Surface charge: 0
9. Complexity: 501
10. Number of isotope atoms: 0
11. Determine the number of atomic stereocenters: 0
12. Uncertain number of atomic stereocenters: 0
13. Determine the number of chemical bond stereocenters: 0
14. Number of uncertain chemical bond stereocenters: 0
15. Number of covalent bond units: 3
Properties and stability
Storage method
Store sealed in a cool, dry place.
Synthesis method
When G salt is prepared by sulfonation and salting out of 2-naphthol, part of R acid is also produced as a by-product. The waste acid after separation of G salt is salted out with sodium chloride to obtain R salt. First add saturated sodium chloride solution to the salting out kettle, preheat to 30°C, then add the R acid solution after sulfonation of 2-naphthol, salting out, and separation of G salt, stir for 1 to 2 minutes, let it stand, and use Suction filter. Then wash with saturated sodium chloride solution 3 to 4 times and blot dry to obtain the finished product R salt.
Purpose
Fluorescent indicator. Diazonium salt��Aromatic amine reagents. Organic Synthesis.
Dye intermediates. Mainly used to prepare azo dyes, food pigments, etc.