Naphthalene-1-sulfonic acid Naphthalene-1-sulfonic acid

Structural formula

• Numbering system
• Physical property data
• Toxicological data
• Ecological data
• Molecular structure data
• Computing chemical data
• More
  • Properties and Stability
  • Storage method
  • Synthesis method
  • Purpose

Numbering system

CAS number:85-47-2

MDL number:MFCD00003987

EINECS number:201-610-1

RTECS number:None

BRN number:None

PubChem number:24851215

Physical property data

1. Characteristics: prismatic white crystals, recrystallized from dilute hydrochloric acid containing 2Molecular crystal water

2. Density (g/mL ,25/4℃): Undetermined

3. Relative vapor density (g/mL, Air=1): Undetermined

4. Melting point (ºC):90 ℃ (hydrate),139-140 ℃ (anhydrous).

5. Boiling point (ºC,Normal pressure): Undetermined

6. Boiling point (ºC,5.2 kPa): Undetermined

7. Refractive Index: Undetermined

8. Flash point (ºC): Undetermined

9. Specific optical rotation (º ): Undetermined

10. Autoignition point or ignition temperature (ºC): Undetermined

11. Vapor pressure (kPa, 25ºC): Undetermined

12.

Synthesis method

Obtained from the sulfonation of naphthalene with chlorosulfonic acid. The sulfonation reaction uses o-nitroethylbenzene as the solvent, and the molar ratio of naphthalene, chlorosulfonic acid and o-nitroethylbenzene1：1.1：3match, in0-5℃Carry out sulfonation reaction, and the purity is97%of1-Naphthalenesulfonic acid. If using98% Sulfuric acid is used as the sulfonating agent, and the reaction temperature is 0-40℃, the obtained sulfonate contains 1 –Naphthalenesulfonic acid83 -85%,2 –Naphthalenesulfonic acid15 -17%, adding magnesium salt or sodium salt can separate the precipitated2-Filter out the magnesium salt or sodium salt of naphthalenesulfonic acid. Contains free1-naphthalene The filtrate of sulfonic acid is concentrated, cooled, crystallized, filtered, washed and dried to obtain the finished product.

Purpose

Used for Manufacturing1-Naphthol , 1-Naphthol Sulfonic acid, 1- Naphthylamine sulfonic acid and other intermediates.

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