C12H12N2S
216.3 g/mol
Industrial ChemicalDanger
4,4'-Thiodianiline
CAS139-65-1EC205-370-9
Category
Industrial Chemical
Compound Class
Amine
Primary Use
Dye intermediate
4,4'-Thiodianiline (TDA) is an organosulfur compound that appears as an off-white solid powder. It is primarily used as a dye intermediate in industrial chemical manufacturing.
dye intermediate
Content scope: Information here supports chemical identification and industrial supply, research, and manufacturing contexts. It is not a therapeutic claim, medical advice, or drug-use instructions.
Restricted or banned substances
Substances on this list are banned or restricted under the named regulation. This page is a compliance reference — verify your obligations under applicable law.
Relevant lists:California Proposition 65
CAS 139-65-1
Related Compounds
ApplicationSame Use
4-Chloro-3-nitrobenzenesulfonic acid
CAS121-18-6
Dye intermediate
ReferenceSame Category
N-ethyldiethanolamine
CAS139-87-7
Solvent and detergent precursor
ReferenceSame Category
Tetrakis(2,6-dimethylphenyl) 1,3-phenylene bisphosphate
CAS139189-30-3
Flame retardant plasticizer
ReferenceSame Category
Bis(N,N-dibutyldithiocarbamato)copper
CAS13927-71-4
industrial additive
ReferenceSame Category
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CAS13927-77-0
Rubber vulcanization accelerator and antioxidant
Referencesame scaffold
Diphenyl sulfide
CAS139-66-2
organosulfur compound intermediate
Referencesame scaffold
2,2'-Thiobis(4-tert-octylphenolato)-n-butylamine nickel(II)
CAS14516-71-3
UV absorber for plastics
Referencesame scaffold
4,4'-Thiodibenzenethiol
CAS19362-77-7
Aryl sulfide intermediate
Safety Reference
Danger
H302Harmful if swallowed
H350May cause cancer
H411Toxic to aquatic life with long lasting effects
H351Suspected of causing cancer
H361Suspected of damaging fertility or the unborn child
H341Suspected of causing genetic defects
Regulatory Compliance1
- California Proposition 65USRegulation
Customs Tariff Classification
The international HS code for 4,4'-Thiodianiline (CAS 139-65-1) is 2930.90.
HS code (international, 6-digit)
2930.90
EU CN code (8-digit)
2930 90 95
Classification per the EU customs inventory ECICS (2026-07 snapshot, HS 2022). National tariff lines and product form can affect the final classification.
Identifiers
IUPAC Name
4-(4-aminophenyl)sulfanylaniline
InChIKey
ICNFHJVPAJKPHW-UHFFFAOYSA-N
SMILES
C1=CC(=CC=C1N)SC2=CC=C(C=C2)N
Synonyms (40)
- BAPS
- 4,4'-Diaminodiphenyl sulfide
- 4,4'-Diaminodiphenylsulphide
- 4,4'-Diaminophenyl sulfide
- 4,4'-THIOBISBENZENAMINE
- 4,4'-Thioaniline
- 4,4'-Thiobis(aniline)
- 4,4'-Thiodianiline
- 4,4'-Thiodianiline RS
- 4,4'-sulfanediyldianiline
- 4-Aminophenyl Sulfide
- 4-Aminophenylthioether
- Aniline, 4,4'-thiodi-
- Aniline,4'-thiodi-
- Benzenamine, 4,4'-thiobis-
- Benzenamine,4'-thiobis-
- Bis(4-aminophenyl) sulfide
- Bis(4-aminophenyl)sulphide
- Bis(p-aminophenyl)sulfide
- Bis(p-aminophenyl)sulphide
- Bis(para-aminophenyl)sulphide
- Dapsone Impurity 12
- Di(p-aminophenyl) sulfide
- Di(p-aminophenyl)sulphide
- Di(para-aminophenyl) sulphide
- Sulfide, bis(p-aminophenyl)
- Thioaniline
- Thiodi-p-phenylenediamine
- Thiodi-para-phenylenediamine
- p,p'-Diaminodiphenyl sulfide
- p,p'-Diaminodiphenyl sulphide
- p,p-Thiodianiline
- para,para'-Thiodianiline