4-Aminoazobenzene (Solvent Yellow 1)
CAS60-09-3
4-Aminoazobenzene (Solvent Yellow 1, CAS 60-09-3), also known as Aniline Yellow, is the simplest amino-substituted azobenzene. Its free amino group can be diazotized and coupled, making it an intermediate for disazo and acid dyes, and it is the reference amine in testing textiles for certain restricted azo colorants. KingPharm supplies 4-aminoazobenzene for research and manufacturing, with a batch-specific certificate of analysis.
- CAS No.
- 60-09-3
- Formula
- C12H11N3
- Mol. weight
- 197.24 g/mol
- Appearance
- powder
Product Description
4-Aminoazobenzene (CAS 60-09-3), also known as Aniline Yellow or C.I. Solvent Yellow 1, consists of an aniline ring joined to a phenyl ring through an azo (-N=N-) bridge. It is a yellow to orange crystalline solid with a melting point of about 123-126 °C and is only slightly soluble in water.
The azo chromophore conjugated with the amino donor gives the compound its yellow colour. The primary amino group can be diazotized and coupled with a second component, so 4-aminoazobenzene serves as a building block for disazo dyes, acid yellow dyes and indulines. It is also used directly as a solvent dye for lacquers, varnishes, waxes and resins.
Unlike unsubstituted azobenzene, 4-aminoazobenzene has a reactive amino handle for diazotization, amide or imine formation. Because certain azo colorants release it on reductive cleavage, it is the target amine in EN ISO 14362-3, the method referenced under REACH Annex XVII for textiles, and testing laboratories use it as a calibration standard.
When evaluating 4-aminoazobenzene, buyers usually check the assay, the melting range, residual aniline and other related substances, appearance and batch-to-batch consistency. Aromatic amines of this class raise carcinogenicity concerns, so handling should follow the SDS. Downstream use in consumer products must also comply with applicable restrictions.
Chemical Specifications
Identifiers
| CAS number | 60-09-3 |
|---|---|
| Product name | 4-Aminoazobenzene |
| Chinese name | 4-氨基偶氮苯 |
| IUPAC name | 4-phenyldiazenylaniline |
| Synonyms | OIL YELLOW B |
| Chinese synonyms | 氨基偶氮苯; 4-(苯基偶氮)苯胺; 4-阿基苯甲酯; 4-氨基偶氮苯; 安尼林黄; 苯胺黄; 标准(偶氮)色基棕; 对氨基二苯基亚胺 |
| Molecular formula | C12H11N3 |
| Molecular weight | 197.24 g/mol |
| EC number | 200-453-6 |
| MDL number | MFCD00007854 |
| PubChem CID | 6051 |
| InChIKey | QPQKUYVSJWQSDY-UHFFFAOYSA-N |
| SMILES | C1=CC=C(C=C1)N=NC2=CC=C(C=C2)N |
Physical and chemical properties
| Appearance | powder |
|---|---|
| Melting Point | 123-126(lit.) ( ℃ ) |
| Boiling Point | 171.92 ( ℃ ) |
Applications
4-Aminoazobenzene is used as a dye intermediate, as a solvent dye, and as a reference standard in azo-colorant testing.
Dye intermediate
4-Aminoazobenzene is diazotized and coupled to make disazo dyes, and serves as a precursor of acid yellow dyes and indulines.
Solvent dye
As Solvent Yellow 1, it colours lacquers, varnishes, wax products, oil stains and styrene resins.
Reference standard for azo-colorant testing
Testing laboratories use it as a calibration standard when checking textiles and leather for azo colorants that release 4-aminoazobenzene (EN ISO 14362-3).
Azobenzene materials research
The amino group provides an attachment point for introducing the photoswitchable azobenzene unit into polymers and functional molecules.
Quality Documentation
The following documents can be provided for 4-Aminoazobenzene (Solvent Yellow 1) to support technical evaluation and purchasing. Documents are issued for the specific grade and batch supplied.
-
Certificate of Analysis (COA) Batch-specific test results against the specification.
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Product specification The release specification with test items, limits and methods.
Packaging, Storage & Transport
| Available pack sizes | 25 kg, 10 kg, 1 kg, 500 g, 100 g, 25 g |
|---|
Safety and transport
| Hazard Level | 第9类 杂类 |
|---|
Read the current safety data sheet before handling. Packaging can be adapted to the order quantity and destination.
Frequently Asked Questions
Are 4-aminoazobenzene, Aniline Yellow and Solvent Yellow 1 the same substance?
Yes. They are names for the same compound, CAS 60-09-3, listed in the Colour Index as C.I. Solvent Yellow 1 (C.I. 11000). Its salts are also used in dyeing.
Are there regulatory restrictions on its use?
In the EU, REACH Annex XVII restricts azo colorants that release listed aromatic amines, including 4-aminoazobenzene, in textile and leather articles in prolonged skin contact (limit 30 mg/kg), and Regulation (EU) 2020/2081 limits it to 0.0005% in tattoo inks. Users should check the rules that apply to their end product.
How should 4-aminoazobenzene be stored and handled?
Keep it in a tightly closed container in a cool, dry place protected from light. Handle it with suitable protective equipment and avoid dust formation, following the SDS.
What is the CAS number of 4-Aminoazobenzene (Solvent Yellow 1)?
The CAS Registry Number of 4-Aminoazobenzene (Solvent Yellow 1) is 60-09-3. 4-Aminoazobenzene (Solvent Yellow 1) is also known as OIL YELLOW B.
What is the molecular formula and molecular weight of 4-Aminoazobenzene (Solvent Yellow 1)?
The molecular formula of 4-Aminoazobenzene (Solvent Yellow 1) is C12H11N3, and its molecular weight is 197.24 g/mol.
What is 4-Aminoazobenzene (Solvent Yellow 1) used for?
4-Aminoazobenzene is used as a dye intermediate, as a solvent dye, and as a reference standard in azo-colorant testing.
Which quality documents are available for 4-Aminoazobenzene (Solvent Yellow 1)?
The following documents are available for 4-Aminoazobenzene (Solvent Yellow 1): Certificate of Analysis (COA); Product specification. Contact KingPharm to request the documents for a specific batch.
How can I request a quotation for 4-Aminoazobenzene (Solvent Yellow 1)?
Send an inquiry for 4-Aminoazobenzene (Solvent Yellow 1) (CAS 60-09-3) with the required quantity, target specification, destination country and any documentation requirements. KingPharm will confirm availability, packaging, lead time and price.
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Page last reviewed on by Leo Xiao.