Home Categories Organic Chemistry Sulfanilic acid
A7297312

Sulfanilic acid , ACS,98.0-102.0% , 121-57-3

Synonym(s):
4-Aminobenzenesulfonic acid;4-Aminobenzenesulfonic acid, Aniline-4-sulfonic acid;Aniline-4-sulfonic acid;Sulfanilic acid;Sulfanilic acid solution

CAS NO.:121-57-3

Empirical Formula: C6H7NO3S

Molecular Weight: 173.19

MDL number: MFCD00007886

EINECS: 204-482-5

Update time: 2022-07-08

PRODUCT Properties

Melting point: >300 °C(lit.)
Boiling point: 288 ℃
Density  1.485
vapor pressure  0Pa at 25℃
refractive index  1.5500 (estimate)
storage temp.  Store below +30°C.
solubility  10g/l
pka 3.24(at 25℃)
form  solid
color  White to Off-White
PH 2.5 (10g/l, H2O, 20℃)
Water Solubility  0.1 g/100 mL (20 ºC)
Merck  14,8926
BRN  908765
Stability: Stable. Incompatible with strong oxidizing agents.
InChIKey HVBSAKJJOYLTQU-UHFFFAOYSA-N
LogP -2.3 at 25℃

Description and Uses

Sulfanilic acid (4-amino benzene sulfonic acid ) is an off-white crystalline solid which finds application in quantitative analysis of nitrate and nitrite ions. The solid acid exists as a zwitterion, and has an unusually high melting point.

Sulfanilic acid may be used for the functionalization of single-walled carbon nanotubes (SWNTs) with aryl sulfonate groups.

Safety

Symbol(GHS) 
GHS07
Signal word  Warning
Hazard statements  H315-H317-H319
Precautionary statements  P261-P264-P272-P280-P302+P352-P305+P351+P338
Hazard Codes  C,Xi
Risk Statements  36/38-43-34
Safety Statements  26-36/37/39-45-37-24-36/37
RIDADR  UN 2790 8/PG 3
WGK Germany  1
RTECS  WP3895500
Autoignition Temperature >400 °C
TSCA  Yes
HS Code  29214210
Toxicity LD50 orally in Rabbit: 12300 mg/kg

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