Safety Reference
Danger
H315Causes skin irritation
H318
Sourcing Sudan III?
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Dye or pigment intermediate
Sourcing Sudan III?
Post a free purchase request — no account needed. It reaches suppliers of this product, and replies go straight to your inbox.
Sudan III is a fat-soluble bis(azo) dye used primarily in histology to demonstrate triglycerides in frozen tissue sections, and it may also stain certain protein-bound lipids in paraffin sections. It has been noted as a carcinogenic agent and is also employed as a fluorochrome and histological dye in laboratory settings.
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.
The international HS code for Sudan III (CAS 85-86-9) is 3204.19.
3204.19
3204 19 00
Classification per the EU customs inventory ECICS (2026-07 snapshot, HS 2022). National tariff lines and product form can affect the final classification.
1-[(4-phenyldiazenylphenyl)diazenyl]naphthalen-2-ol
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