Safety Reference
Danger
H301Toxic if swallowed
H302
Sourcing Theophylline?
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Sourcing Theophylline?
Post a free purchase request — no account needed. It reaches suppliers of this product, and replies go straight to your inbox.
Theophylline, also known as 1,3-dimethylxanthine, is a methylxanthine compound that inhibits phosphodiesterase and blocks adenosine receptors. It is used as a bronchodilator active pharmaceutical ingredient in the management of chronic obstructive pulmonary disease and asthma.
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 Theophylline (CAS 58-55-9) is 2939.59.
2939.59
2939 59 00
Classification per the EU customs inventory ECICS (2026-07 snapshot, HS 2022). National tariff lines and product form can affect the final classification.
1,3-dimethyl-7H-purine-2,6-dione
ZFXYFBGIUFBOJW-UHFFFAOYSA-N
CN1C2=C(C(=O)N(C1=O)C)NC=N2