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Substance Name: 1,5-Naphthalenedisulfonic acid, 3-amino-
RN: 131-27-1

Classification Code

  • Skin / Eye Irritant

Molecular Formula

  • C10-H9-N-O6-S2

Molecular Weight

  • 303.314
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Names and Synonyms


  • 2-Amino-4,8-naphthalenedisulfonic acid
  • 2-Naphthylamine-4,8-disulfonic acid
  • 3-14-00-02264 (Beilstein Handbook Reference)
  • 3-Amino-1,5-naphthalenedisulfonic acid
  • 4,8-Disulfo-2-naphthalamine
  • 7-Amino-1,5-naphthalenedisulfonic acid
  • Acid IV
  • beta-Naphthylamine-4,8-disulfonic acid
  • beta-Naphthylaminedisulfonic acid
  • BRN 3104699
  • C acid
  • EINECS 205-020-5
  • Kyselina 2-naftylamin-4,8-disulfonova
  • Kyselina 2-naftylamin-4,8-disulfonova [Czech]
  • Kyselina C
  • Kyselina C [Czech]
  • NSC 7558

Systematic Names

  • 1,5-Naphthalenedisulfonic acid, 3-amino-
  • 3-Aminonaphthalene-1,5-disulphonic acid

Superlist Name

  • 3-Amino-1,5-naphthalenedisulfonic acid

Registry Numbers

CAS Registry Number

  • 131-27-1

System Generated Number

  • 0000131271

Structure Descriptors








Organism Test Type Route Reported Dose (Normalized Dose) Effect Source
rat LD50 oral 11400mg/kg (11400mg/kg)   "Prehled Prumyslove Toxikologie; Organicke Latky," Marhold, J., Prague, Czechoslovakia, Avicenum, 1986Vol. -, Pg. 1058, 1986.

Physical Properties

Physical Property Value Units Temp (deg C) Source
log P (octanol-water) -1.850 (none)   EST
Water Solubility 4490 mg/L 25 EST
Vapor Pressure 1.61E-15 mm Hg 25 EST
Henry's Law Constant 4.06E-20 atm-m3/mole 25 EST
Atmospheric OH Rate Constant 9.67E-12 cm3/molecule-sec 25 EST

Physical property data is provided to ChemIDplus by SRC, Inc.