Epoxy curing agent Knowledge 2-Naphthol-3,6-disulfonic acid disodium salt

2-Naphthol-3,6-disulfonic acid disodium salt

广告位

2-naphthol-3,6-disulfonic acid disodium salt structural formula

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.

广告位
This article is from the Internet, does not represent the position of Epoxy curing agent, reproduced please specify the source.https://www.dmp-30.vip/archives/94402

author:

Previous article
Next article
Contact Us

Contact us

+86 - 152 2121 6908

Online consultation: QQ交谈

E-mail: info@newtopchem.com

Working hours: Monday to Friday, 9:00-17:30, closed on holidays
Follow wechat
Scan wechat and follow us

Scan wechat and follow us

Follow Weibo
Back to top
Home
Phone
Products
Search