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121-57-3

121-57-3 Structure

121-57-3 Structure
IdentificationMore
[Name]

Sulfanilic acid
[CAS]

121-57-3
[Synonyms]

4-AMINOBENZENESULFONIC ACID
4-AMINOBENZENESULPHONIC ACID
4-AMINOBENZOIC ACID
4-ANILINESULFONIC ACID
4-SULFOANILINE
ANILINE-4-SULFONIC ACID
ANILINE P-SULFONIC ACID
NITRATE REAGENT B
P-AMINOBENZENESULFONIC ACID
P-ANILINESULFONIC ACID
P-SULFANILIC ACID
SUFANILIC ACID
SULFANILIC ACID
SULFANILIC ACID TS
SULFANILLIC ACID
SULPHANILIC ACID
4-amino-benzenesulfonicaci
Aniline-p-sulphonic acid
aniline-p-sulphonicacid
Kyselina sulfanilova
[EINECS(EC#)]

204-482-5
[Molecular Formula]

C6H7NO3S
[MDL Number]

MFCD00007886
[Molecular Weight]

173.19
[MOL File]

121-57-3.mol
Chemical PropertiesBack Directory
[Appearance]

greyish-white crystals or powder
[Melting point ]

>300 °C(lit.)
[mp ]

>300 °C(lit.)
[density ]

1.485
[refractive index ]

1.5500 (estimate)
[storage temp. ]

Store in dark!
[solubility ]

10g/l
[form ]

solid
[pka]

3.24(at 25℃)
[Stability:]

Stable. Incompatible with strong oxidizing agents.
[PH]

2.5 (10g/l, H2O, 20℃)
[Water Solubility ]

0.1 g/100 mL (20 ºC)
[Merck ]

14,8926
[BRN ]

908765
[InChIKey]

HVBSAKJJOYLTQU-UHFFFAOYSA-N
[CAS DataBase Reference]

121-57-3(CAS DataBase Reference)
[NIST Chemistry Reference]

Benzenesulfonic acid, 4-amino-(121-57-3)
[EPA Substance Registry System]

121-57-3(EPA Substance)
Safety DataBack Directory
[Hazard Codes ]

C,Xi
[Risk Statements ]

R36/38:Irritating to eyes and skin .
R43:May cause sensitization by skin contact.
R34:Causes burns.
[Safety Statements ]

S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice .
S36/37/39:Wear suitable protective clothing, gloves and eye/face protection .
S45:In case of accident or if you feel unwell, seek medical advice immediately (show label where possible) .
S37:Wear suitable gloves .
S24:Avoid contact with skin .
[RIDADR ]

UN 2790 8/PG 3
[WGK Germany ]

1
[RTECS ]

WP3895500
[Autoignition Temperature]

>400 °C
[TSCA ]

Yes
[HS Code ]

29214210
[Hazardous Substances Data]

121-57-3(Hazardous Substances Data)
[Toxicity]

LD50 orally in Rabbit: 12300 mg/kg
Raw materials And Preparation ProductsBack Directory
【Raw materials】

Sulfuric acid-->Aniline
【Preparation Products】

p-Anisaldehyde-->Tartrazine-->Piperonyl aldehyde-->4-Amino-benzenesulfonic acid monosodium salt-->Sunset Yellow FCF-->new red-->4-Chlorobenzenesulfonyl chloride-->Methyl Orange-->Acid Orange 7-->ACID YELLOW 17-->Fluorescent Brightener VBU-->REACTIVE GREEN 19-->Reactive Dark Blue M-2ge-->Direct Blending Yellow D-3RNL-->REACTIVE RED 4-->N-Phenyl-1-naphthylamine-->4-Chlorobenzenesulfonic acid-->Reactive Violet 2-->C. I. Pigment Red 56-->Sumilight Supra Orangl 2GL-->CIBACRON BRILLIANT YELLOW 3G-P-->8,8-Dimethoxy-2,6-dimethyloctan-2-ol-->AURAMINE O-->Direct Blending Brilliant Red D-5BL-->Direct Red Brown RN-->Reactive Red 15-->Acid Yellow 199-->Direct Blend Rubine D-BLL-->Direct Violet 9-->4-Amino-1,3-benzenedisulfonic acid-->sodium N-benzylsulphanilate-->DIRECT RED 80-->Acid Orange 156-->4-amino-1-naphthol-->Direct Blending Scarlet D-GLN-->Direct Blending Brilliant Red D-10BL
Hazard InformationBack Directory
[General Description]

White powder with faint purple tinge. Grayish-white flat crystals. Becomes anhydrous at around 212°F. Low toxicity (used medicinally).
[Reactivity Profile]

4-AMINOBENZENE SULFONIC ACID(121-57-3) is an amino acid. Reacts weakly with both acids and bases.
[Air & Water Reactions]

Insoluble in water.
[Fire Hazard]

Flash point data for this chemical are not available, however 4-AMINOBENZENE SULFONIC ACID is probably combustible.
[Description]

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.
[Chemical Properties]

greyish-white crystals or powder
[Uses]

A toxic metabolite of Tartrazine (T007700). Used as Ehrlich’s reagent, for detecting of nitrites. Antibacterial.
[Application]

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.
[Definition]

ChEBI: An aminobenzenesulfonic acid that is aniline sulfonated at the para-position.
[Chemical Synthesis]

Sulfanilic acid can be produced by sulfonation of aniline.
[Purification Methods]

Crystallise the acid (as dihydrate) from boiling water. Dry it at 105o for 2-3hours, then over 90% H2SO4 in a vacuum desiccator. The S-benzylisothiuronium salt has m 187o (from aqueous EtOH). [Beilstein 14 IV 2655.]
Material Safety Data Sheet(MSDS)Back Directory
[msds information]

4-Anilinesulfonic acid(121-57-3).msds
Spectrum DetailBack Directory
[Spectrum Detail]

Sulfanilic acid(121-57-3) IR2
Sulfanilic acid(121-57-3) IR1
Sulfanilic acid(121-57-3) 13C NMR
Sulfanilic acid(121-57-3) MS
Sulfanilic acid(121-57-3) 1H NMR
Well-known Reagent Company Product InformationBack Directory
[Acros Organics]

Sulfanilic acid, 99%(121-57-3)
[Alfa Aesar]

Sulfanilic acid, ACS, 98.0-102.0%(121-57-3)
[Sigma Aldrich]

121-57-3(sigmaaldrich)
[TCI AMERICA]

Sulfanilic Acid,>99.0%(LC)(T)(121-57-3)
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