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HomeProduct name list1-Naphthylamine-7-sulfonic acid

1-Naphthylamine-7-sulfonic acid

Synonym(s):1-Naphthylamine-7-sulfonic acid;Cleves acid-1,7

  • CAS NO.:119-28-8
  • Empirical Formula: C10H9NO3S
  • Molecular Weight: 223.25
  • MDL number: MFCD00004032
  • EINECS: 204-311-4
  • SAFETY DATA SHEET (SDS)
  • Update Date: 2024-10-24 21:11:45
1-Naphthylamine-7-sulfonic acid Structural

What is 1-Naphthylamine-7-sulfonic acid?

Chemical properties

Brown crystalline. 1-Aminonaphthalene-7-sulfonic acid [119- 28-8]. (8-aminonaphthalene-2-sulfonic acid), 1,7-Cleve’s acid, C10H9NO3S, Mr 223.24, is 0.5 % soluble in water at 25℃ and 3 % soluble at 100 ℃. The sodium, potassium, calcium, and magnesium salts are readily soluble in water but the barium salt is only sparingly soluble. Sulfonation with oleum at 50℃ gives 1- aminonaphthalene-4,7-disulfonic acid. Alkali fusion gives 8-amino-2-naphthol, and Bucherer-type hydrolysis gives 1-hydroxynaphthalene-7-sulfonic acid.

The Uses of 1-Naphthylamine-7-sulfonic acid

Intermediate of dyestuff

The Uses of 1-Naphthylamine-7-sulfonic acid

8-Amino-2-naphthalenesulfonic acid can be used as a reactant to synthesize:

  • Fe3O4/sulfonated polyaniline composite material via chemical oxidative polymerization with aniline in the presence of magnetite (Fe3O4) nanoparticles.
  • Prismatic crystals of strychnine-8-ammonio-2-naphthalenesulfonate-water by heating with strychnine in water/ethanol solvent mixture.
  • 5-amino-9-dialkylamino benzo[a]phenoxazine dyes (Nile blue analogs) by condensation with N-alkyl or N-sulfo-propyl 4-arylazo-substituted 3-hydroxyaniline.

What are the applications of Application

1-Naphthylamine-7-sulfonic acid can be used as a dye intermediate to prepare dyes such as direct light fast blue B2RL, direct light fast red brown RTL, and sulfur blue CV.

Properties of 1-Naphthylamine-7-sulfonic acid

Melting point: ≥300 °C(lit.)
Boiling point: 220°C (rough estimate)
Density  1.3588 (rough estimate)
refractive index  1.6500 (estimate)
storage temp.  Sealed in dry,Room Temperature
solubility  Aqueous Base (Slightly), DMSO (Slightly, Sonicated)
pka pK1: 3.66 (25°C)
form  Powder
Merck  14,2351
BRN  2115629
CAS DataBase Reference 119-28-8(CAS DataBase Reference)
NIST Chemistry Reference 1-Naphthylamine-7-sulfonic acid(119-28-8)
EPA Substance Registry System 2-Naphthalenesulfonic acid, 8-amino- (119-28-8)

Safety information for 1-Naphthylamine-7-sulfonic acid

Signal word Danger
Pictogram(s)
ghs
Corrosion
Corrosives
GHS05
GHS Hazard Statements H314:Skin corrosion/irritation
Precautionary Statement Codes P260:Do not breathe dust/fume/gas/mist/vapours/spray.
P280:Wear protective gloves/protective clothing/eye protection/face protection.
P363:Wash contaminated clothing before reuse.
P303+P361+P353:IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower.
P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

Computed Descriptors for 1-Naphthylamine-7-sulfonic acid

InChIKey QEZZCWMQXHXAFG-UHFFFAOYSA-N

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