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HomeProduct name list6-Amino-1-naphthalenesulfonic acid

6-Amino-1-naphthalenesulfonic acid

  • CAS NO.:81-05-0
  • Empirical Formula: C10H9NO3S
  • Molecular Weight: 223.25
  • MDL number: MFCD00035724
  • EINECS: 201-318-4
  • SAFETY DATA SHEET (SDS)
  • Update Date: 2024-05-31 17:33:32
6-Amino-1-naphthalenesulfonic acid Structural

What is 6-Amino-1-naphthalenesulfonic acid?

Chemical properties

2-Aminonaphthalene-5-sulfonic acid [81-05-0]. (6-aminonaphthalene-1-sulfonic acid), Dahl’s acid, Dressel acid, D acid, C10H9NO3S, Mr 223.24, crystallizes from water as needles although only 0.4 % soluble at 100℃. The sodium, calcium, and barium salts are moderately soluble in water. Bromination in acetic acid gives the 1-bromo derivative. Sulfonation with oleum gives a mixture of 2-aminonaphthalene-5,7-disulfonic acid together with some 1,5-disulfonic acid. Fusion with potassium hydroxide at 260℃ yields 6-amino-1-naphthol.

What are the applications of Application

6-Amino-1-naphthalenesulfonic acid is a product for proteomics research

Production Methods

Tobias acid is added to a mixture of sulfuric acid and oleum, and the reaction is completed by stirring for 12 h at 25℃. The resulting sulfonation mass, containing mainly 2-aminonaphthalene-1,5-disulfonic acid, is poured into water and heated at 105℃ for 3 h to desulfonate and precipitate the product which, after cooling, is filtered off; the yield is 95 %.

Properties of 6-Amino-1-naphthalenesulfonic acid

Density  1.3588 (rough estimate)
refractive index  1.6500 (estimate)
storage temp.  under inert gas (nitrogen or Argon) at 2–8 °C
pka -0.33±0.40(Predicted)
form  powder to crystal
color  White to Light yellow to Light red
Water Solubility  0.33g/L(20 ºC)
Merck  14,6407
CAS DataBase Reference 81-05-0(CAS DataBase Reference)

Safety information for 6-Amino-1-naphthalenesulfonic acid

Signal word Warning
Pictogram(s)
ghs
Exclamation Mark
Irritant
GHS07
GHS Hazard Statements H315:Skin corrosion/irritation
H319:Serious eye damage/eye irritation
Precautionary Statement Codes P264:Wash hands thoroughly after handling.
P264:Wash skin thouroughly after handling.
P280:Wear protective gloves/protective clothing/eye protection/face protection.

Computed Descriptors for 6-Amino-1-naphthalenesulfonic acid

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