Safety Reference
Warning
H302Harmful if swallowed
H312Harmful in contact with skin
H315Causes skin irritation
H319Causes serious eye irritation
H335May cause respiratory irritation
Sourcing Indole-5-carboxylic acid?
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pharmaceutical intermediate
Sourcing Indole-5-carboxylic acid?
Post a free purchase request — no account needed. It reaches suppliers of this product, and replies go straight to your inbox.
Indole-5-carboxylic acid is an indolecarboxylic acid with the carboxy group located at position 5. It is a naturally occurring plant metabolite and is used as a biochemical research reagent.
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 Indole-5-carboxylic acid (CAS 1670-81-1) is 2933.99.
2933.99
2933 99 80
Classification per the EU customs inventory ECICS (2026-07 snapshot, HS 2022). National tariff lines and product form can affect the final classification.
1H-indole-5-carboxylic acid
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C1=CC2=C(C=CN2)C=C1C(=O)O