Sulfanilic acid CAS#121-57-3

CAS Number: 121-57-3
Chemical Formula: C6H7NO3S
Synonyms:

4-aminobenzenesulfonate
Diazobenzenesulfonic acid test solution(ChP)
p-Anilinesulfonic acid anhydrous

Appearance: White Powder

MOQ (Minimum Order Quantity): 1 FCL (Full Container Load)

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Product Details

Sulfanilic acid CAS#121-57-3

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 zwit

Sulfanilic acid Chemical Properties

Melting point	>300 °C(lit.)
Boiling point	288 ℃
bulk density	620kg/m3
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.
InChI	1S/C6H7NO3S/c7-5-1-3-6(4-2-5)11(8,9)10/h1-4H,7H2,(H,8,9,10)
InChIKey	HVBSAKJJOYLTQU-UHFFFAOYSA-N
SMILES	Nc1ccc(cc1)S(O)(=O)=O
LogP	-2.3 at 25℃
CAS DataBase Reference	121-57-3(CAS DataBase Reference)
NIST Chemistry Reference	Benzenesulfonic acid, 4-amino-(121-57-3)
EPA Substance Registry System	Sulfanilic acid (121-57-3)

Safety Information

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	TSCA listed
HS Code	29214210
Storage Class	11 - Combustible Solids
Hazard Classifications	Eye Irrit. 2 Skin Irrit. 2 Skin Sens. 1
Hazardous Substances Data	121-57-3(Hazardous Substances Data)
Toxicity	LD50 orally in Rabbit: 12300 mg/kg

Product Application Of Sulfanilic acid CAS#121-57-3

As the compound readily form diazo compounds, it is used to make dyes and sulpha drugs . This property is also used for the quantitative analysis of nitrate and nitrite ions by diazonium coupling reaction with N-(1-Naphthyl) ethylene diamine , resulting in an azo dye, and the concentration of nitrate or nitrite ions were deduced from the color intensity of the resulting red solution by colorimetry.
It is also used as a standard in combustion analysis.

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