Safety Reference
Danger
H341Suspected of causing genetic defects
H350May cause cancer
H361Suspected of damaging fertility or the unborn child
Sourcing Thymophthalein?
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pH indicator dye
Sourcing Thymophthalein?
Post a free purchase request — no account needed. It reaches suppliers of this product, and replies go straight to your inbox.
Thymolphthalein is a phthalein dye primarily used as an acid-base pH indicator. It transitions from colorless to blue in the pH range of approximately 9.
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 Thymophthalein (CAS 125-20-2) is 2932.20.
2932.20
2932 20 90
Classification per the EU customs inventory ECICS (2026-07 snapshot, HS 2022). National tariff lines and product form can affect the final classification.
3,3-bis(4-hydroxy-2-methyl-5-propan-2-ylphenyl)-2-benzofuran-1-one
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