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API

Trimethoprim

Trimethoprim is listed in the Vencilla catalogue as an active pharmaceutical ingredient for business-to-business sourcing enquiries. Molecular formula C14H18N4O3; molecular weight 290.32 g/mol (PubChem CID 5578). Share the required grade, specification, quantity, documentation and destination market with your enquiry.

Product overview

Product type
API
Type
API
Vencilla ID
PRD-100401

Chemical identity

CAS number
738-70-5
Molecular formula
C14H18N4O3
Molecular weight
290.32 g/mol
Synonyms
Trimethoprime; Trimethoprimum
IUPAC name
5-[(3,4,5-trimethoxyphenyl)methyl]pyrimidine-2,4-diamine
PubChem CID
5578 (opens PubChem in a new tab)
InChIKey
IEDVJHCEMCRBQM-UHFFFAOYSA-N

Reference properties

Physical description
Trimethoprim is an odorless white powder. Bitter taste. (NTP, 1992) (CAMEO Chemicals, US NOAA)
Colour / form
White to cream, crystalline powder (Hazardous Substances Data Bank (HSDB), US National Library of Medicine)
Melting point
390 to 397 °F (NTP, 1992) (CAMEO Chemicals, US NOAA)
Solubility
less than 1 mg/mL at 75 °F (NTP, 1992) (CAMEO Chemicals, US NOAA)

Published literature values for the substance, with their source. They are not a specification of supplied material; the specification for each supply is confirmed with the enquiry.

Technical specification

Product specifications (salt or form, grade and pack) are confirmed for each enquiry during qualification.

References

Reference information researched 2026-10-14.

Documentation

Documentation requirements are reviewed for each enquiry during qualification.

Market compliance

Regulatory, import and registration requirements depend on the destination market and the intended use, and are reviewed for each enquiry. This record does not indicate approval, registration or authorisation in any market.

Pharmaceutical sourcing disclaimer

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