4'-Aminoazobenzene-4-sulphonic acid

Modify Date: 2026-07-01 07:50:19

4'-Aminoazobenzene-4-sulphonic acid Structure
4'-Aminoazobenzene-4-sulphonic acid structure
 Common Name 4'-Aminoazobenzene-4-sulphonic acid
CAS Number 104-23-4 Molecular Weight 299.281
Density 1.43 g/cm3 Boiling Point N/A
Molecular Formula C12H10N3NaO3S Melting Point 125-131 °C
MSDS N/A Flash Point N/A

 Names

This table lists Chinese names, IUPAC names and various aliases of this chemical substance.

Name 4-((4-aminophenyl)diazenyl)benzenesulfonic acid
Synonym More Synonyms

 Chemical & Physical Properties

This table shows physicochemical parameters including melting point, boiling point, density, solubility and optical rotation. Missing data is marked as N/A.

Density 1.43 g/cm3
Melting Point 125-131 °C
Molecular Formula C12H10N3NaO3S
Molecular Weight 299.281
Exact Mass 299.034058
PSA 116.32000
LogP 4.25030
Index of Refraction 1.663
InChIKey PPVRMPPLECDING-UHFFFAOYSA-N
SMILES Nc1ccc(N=Nc2ccc(S(=O)(=O)O)cc2)cc1

 MSDS

This table provides MSDS information including hazard classification, first‑aid, fire‑fighting, spill handling, operation and storage instructions.

Material Safety Data Sheet
Section1. Identification of the substance
Product Name: 4’-Aminoazobenzene-4-sulphonic acid
Synonyms:
Section2. Hazards identification
Harmful by inhalation, in contact with skin, and if swallowed.
Section3. Composition/information on ingredients.
Ingredient name:4’-Aminoazobenzene-4-sulphonic acid
CAS number:104-23-4
Section4. First aid measures
Skin contact:Immediately wash skin with copious amounts of water for at least 15 minutes while removing
contaminated clothing and shoes. If irritation persists, seek medical attention.
Eye contact:Immediately wash skin with copious amounts of water for at least 15 minutes. Assure adequate
flushing of the eyes by separating the eyelids with fingers. If irritation persists, seek medical
attention.
Inhalation:Remove to fresh air. In severe cases or if symptoms persist, seek medical attention.
Ingestion:Wash out mouth with copious amounts of water for at least 15 minutes. Seek medical attention.
Section5. Fire fighting measures
In the event of a fire involving this material, alone or in combination with other materials, use dry
powder or carbon dioxide extinguishers. Protective clothing and self-contained breathing apparatus
should be worn.
Section6. Accidental release measures
Personal precautions: Wear suitable personal protective equipment which performs satisfactorily and meets local/state/national
standards.
Respiratory precaution:Wear approved mask/respirator
Hand precaution:Wear suitable gloves/gauntlets
Skin protection:Wear suitable protective clothing
Eye protection:Wear suitable eye protection
Methods for cleaning up: Mix with sand or similar inert absorbent material, sweep up and keep in a tightly closed container
for disposal. See section 12.
Environmental precautions: Do not allow material to enter drains or water courses.
Section7. Handling and storage
Handling:This product should be handled only by, or under the close supervision of, those properly qualified
in the handling and use of potentially hazardous chemicals, who should take into account the fire,
health and chemical hazard data given on this sheet.
Store in closed vessels, refrigerated.
Storage:
Section8. Exposure Controls / Personal protection
Engineering Controls: Use only in a chemical fume hood.
Personal protective equipment: Wear laboratory clothing, chemical-resistant gloves and safety goggles.
General hydiene measures: Wash thoroughly after handling. Wash contaminated clothing before reuse.
Section9. Physical and chemical properties
Appearance:Not specified
Boiling point:No data
No data
Melting point:
Flash point:No data
Density:No data
Molecular formula:C12H11N3O3S
Molecular weight:277.3
Section10. Stability and reactivity
Conditions to avoid: Heat, flames and sparks.
Materials to avoid: Oxidizing agents.
Possible hazardous combustion products: Carbon monoxide, nitrogen oxides, sulfur oxides.
Section11. Toxicological information
No data.
Section12. Ecological information
No data.
Section13. Disposal consideration
Arrange disposal as special waste, by licensed disposal company, in consultation with local waste
disposal authority, in accordance with national and regional regulations.
Section14. Transportation information
Non-harzardous for air and ground transportation.
Section15. Regulatory information
No chemicals in this material are subject to the reporting requirements of SARA Title III, Section
302, or have known CAS numbers that exceed the threshold reporting levels established by SARA
Title III, Section 313.

SECTION 16 - ADDITIONAL INFORMATION
N/A

 Toxicological Information

This table summarizes toxicological test data, acute & chronic toxicity and ecological hazard parameters for this chemical.

CHEMICAL IDENTIFICATION

RTECS NUMBER :
DB5010000
CHEMICAL NAME :
Benzenesulfonic acid, p-((p-aminophenyl)azo)-
CAS REGISTRY NUMBER :
104-23-4
BEILSTEIN REFERENCE NO. :
0753101
LAST UPDATED :
199709
DATA ITEMS CITED :
2
MOLECULAR FORMULA :
C12-H11-N3-O3-S
MOLECULAR WEIGHT :
277.32
WISWESSER LINE NOTATION :
ZR DNUNR DSWQ

HEALTH HAZARD DATA

ACUTE TOXICITY DATA

MUTATION DATA

TYPE OF TEST :
Morphological transformation
TEST SYSTEM :
Rodent - hamster Kidney
DOSE/DURATION :
25 mg/L
REFERENCE :
BJCAAI British Journal of Cancer. (Macmillan Press Ltd., Houndmills, Basingstoke, Hants. RG21 2XS, UK) V.1- 1947- Volume(issue)/page/year: 38,34,1978

 Safety Information

This table covers safety warnings, protective measures, incompatible substances and disposal guidelines for this compound.

Hazard Codes Xi
Safety Phrases S22-S24/25
WGK Germany 3
HS Code 2927000090

 Synthetic Route

This table presents publicly reported synthetic routes, reaction conditions, reactants and product information of the compound.

 Customs

This table shows customs‑related data including HS‑code, tariff and regulatory conditions for import and export.

HS Code 2927000090
Summary 2927000090 other diazo-, azo- or azoxy-compounds。Supervision conditions:None。VAT:17.0%。Tax rebate rate:9.0%。MFN tariff:6.5%。General tariff:30.0%

 Synonyms

This table collects all English aliases, systematic names and CAS‑related synonyms of the compound.

Sodium 4-[(E)-(4-aminophenyl)diazenyl]benzenesulfonate
Benzenesulfonic acid, p-[(p-aminophenyl)azo]-, sodium salt
4-[(4-aminophenyl)diazenyl]benzenesulfonic acid
Benzenesulfonic acid, p-[(p-aminophenyl)azo]-, monosodium salt
MFCD00035564
Benzenesulfonic acid, 4-[(E)-2-(4-aminophenyl)diazenyl]-, sodium salt (1:1)
EINECS 203-187-9
Benzenesulfonic acid, 4-[(4-aminophenyl)azo]-, sodium salt

 4'-Aminoazobenzene-4-sulphonic acid | FAQ

This section contains frequently‑asked‑questions about this compound, including basic parameters, properties, storage conditions and corresponding answers.

Q: What is the molecular weight of 4-((4-aminophenyl)diazenyl)benzenesulfonic acid?
A: Molecular weight of 4-((4-aminophenyl)diazenyl)benzenesulfonic acid is 299.281.
Q: What is the safety information for 4-((4-aminophenyl)diazenyl)benzenesulfonic acid?
A: Safety information for 4-((4-aminophenyl)diazenyl)benzenesulfonic acid: S22-S24/25.
Q: What is the InChIKey of 4-((4-aminophenyl)diazenyl)benzenesulfonic acid?
A: InChIKey of 4-((4-aminophenyl)diazenyl)benzenesulfonic acid is PPVRMPPLECDING-UHFFFAOYSA-N.
Q: What are the upstream materials of 4-((4-aminophenyl)diazenyl)benzenesulfonic acid?
A: Related upstream materials(CAS) of 4-((4-aminophenyl)diazenyl)benzenesulfonic acid: 3457-98-5;23792-61-2;305-80-6;68-34-8;7664-93-9;60-09-3;547-58-0;64-17-5;861869-60-5.
Q: What is the CAS number of 4-((4-aminophenyl)diazenyl)benzenesulfonic acid?
A: CAS number of 4-((4-aminophenyl)diazenyl)benzenesulfonic acid is 104-23-4.
Q: What is the polar surface area (PSA) of 4-((4-aminophenyl)diazenyl)benzenesulfonic acid?
A: Polar surface area (PSA) of 4-((4-aminophenyl)diazenyl)benzenesulfonic acid is 116.32000.
Q: What English synonyms does 4-((4-aminophenyl)diazenyl)benzenesulfonic acid have?
A: English synonyms of 4-((4-aminophenyl)diazenyl)benzenesulfonic acid: Sodium 4-[(E)-(4-aminophenyl)diazenyl]benzenesulfonate, Benzenesulfonic acid, p-[(p-aminophenyl)azo]-, sodium salt, 4-[(4-aminophenyl)diazenyl]benzenesulfonic acid, Benzenesulfonic acid, p-[(p-aminophenyl)azo]-, monosodium salt, MFCD00035564, Benzenesulfonic acid, 4-[(E)-2-(4-aminophenyl)diazenyl]-, sodium salt (1:1), EINECS 203-187-9, Benzenesulfonic acid, 4-[(4-aminophenyl)azo]-, sodium salt.
Q: What is the molecular formula of 4-((4-aminophenyl)diazenyl)benzenesulfonic acid?
A: Molecular formula of 4-((4-aminophenyl)diazenyl)benzenesulfonic acid is C12H10N3NaO3S.
Q: What is the English name of 4-((4-aminophenyl)diazenyl)benzenesulfonic acid?
A: The English name of 4-((4-aminophenyl)diazenyl)benzenesulfonic acid is 4-((4-aminophenyl)diazenyl)benzenesulfonic acid.
Q: What is the LogP of 4-((4-aminophenyl)diazenyl)benzenesulfonic acid?
A: LogP of 4-((4-aminophenyl)diazenyl)benzenesulfonic acid is 4.25030.

 4'-Aminoazobenzene-4-sulphonic acidfactory

This table lists manufacturers and suppliers of this compound, including vendor names and product supply reference information.

Shanghai Nianxing Industrial Co., Ltd
Dayang Chem (Hangzhou) Co., Ltd.
Henan Tianfu Chemical Co., Ltd.
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