Hengyuan Fine Chemical is a leading supplier of reference materials and standards, specializing in providing high-precision and highly reliable solutions for industries such as environmental testing, food safety, and pharmaceutical research and development. We offer nearly 50,000 ready-to-ship products, including pharmaceutical impurity reference standards, chemical analysis reference standards, pharmacopoeial titrants, biopeptide reference standards, and more, meeting the testing needs of various industries.

With a craftsmanship spirit at our core, we are committed to refining every product to ensure its quality and accuracy. At the same time, we understand customer needs through in-depth communication, providing customized solutions and fast delivery services to support the efficient progress of your projects.

Hengyuan Fine Chemical—where precision becomes a habit and trust becomes a bond.

Product Number	Image	Product Name	CAS No.	Molecular Formula
Product Number:PCL-#-Zo008-50mg		Product Name:Zoledronic acid impurity A	CAS No.:1627731-60-5	Molecular Formula:
Product Number:PCL-#-Oi456-20mg		Product Name:Chinese Pharmacopoeia Impurity IV	CAS No.:2362529-32-4	Molecular Formula:
Product Number:PCL-#-Bz0100-50mg		Product Name:Chlorpheniramine EP impurity E	CAS No.:N/A	Molecular Formula:
Product Number:PCL-#-P562-20mg		Product Name:5-Chlorobenzo-2,1,3-thiadiazole	CAS No.:2207-32-1	Molecular Formula:
Product Number:PCL-#-Bz0183-50mg		Product Name:1,5,6,7-Tetrahydro-4H-pyrrolo[3,2-C]pyridin-4-one	CAS No.:736990-65-1	Molecular Formula:
Product Number:PCL-#-Bi2011-50mg		Product Name:3,4-Bis(difluoromethoxy)benzaldehyde	CAS No.:127842-54-0	Molecular Formula:
Product Number:PCL-#-Di108-50mg		Product Name:(S,S)-2,8-Diazabicyclo[4,3,0]nonane (saxin side chain)	CAS No.:151213-42-2	Molecular Formula:
Product Number:PCL-#-Bz0075-50mg		Product Name:Atorvastatin impurity 10	CAS No.:1146977-93-6	Molecular Formula:
Product Number:PCL-#-Bz0022-50mg		Product Name:m-Hydroxylamine intermediate isomers	CAS No.:639070-81-8	Molecular Formula:
Product Number:PCL-#-Am030-50mg		Product Name:Ambroxol hydrochloride impurity 4	CAS No.:N/A	Molecular Formula:
Product Number:PCL-#-Bz0261-50mg		Product Name:Daptomycin beta-isomer	CAS No.:123180-72-3	Molecular Formula:
Product Number:PCL-#-At103-25mg		Product Name:Atropine impurity E (7-hydroxyscopolamine); Atropine EP impurity E	CAS No.:N/A	Molecular Formula:
Product Number:100924		Product Name:Matemacrophenol ester impurity F (mescaline)	CAS No.:100924-N/A	Molecular Formula:
Product Number:PCL-#-De018-30mg		Product Name:Dexmedetomidine Impurity 10, Racemic	CAS No.:944263-08-5	Molecular Formula:
Product Number:PCL-#-No005-50mg		Product Name:Norfloxacin impurities2	CAS No.:75001-63-7	Molecular Formula:
Product Number:PCL-#-Et010-50mg		Product Name:Bis(ethylhexyloxy)phenol methoxybenzotriazine	CAS No.:187393-00-6	Molecular Formula:
Product Number:PCL-#-Gl008-200mg		Product Name:Pentadienal diphenylamine hydrochloride	CAS No.:1497-49-0	Molecular Formula:
Product Number:PCL-#-Di127-50mg		Product Name:1-(2,3-Dichlorophenyl)piperazine dimer hydrochloride; 1,1'-(Ethane-1,1-diphenyl(2,3-dichloro-4,1-phenylene))bis-piperazine dihydrochloride; Piperazine dimer impurity	CAS No.:519138-48-8	Molecular Formula:
Product Number:PCL-#-Sf512-50mg		Product Name:Sodium fusidic acid	CAS No.:751-94-0	Molecular Formula:
Product Number:PCL-#-Bz0163-50mg		Product Name:Adefovir impurity A	CAS No.:142341-05-7	Molecular Formula:

1. <
2. 394
3. 395
4. 396
5. 397
6. 398
7. >
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420421422423424425426427428429430431432433434435436437438439440441442443444445446447448449450451452453454455456457458459460461462463464465466467468469470471472473474475476477478479480481482483484485486487488489490491492493494495496497498499500501502503504505506507508509510511512513514515516517518519520521522523524525526527528529530531532533534535536537538539540541542543544545546547548549550551552553554555556557558559560561562563564565566567568569570571572573574575576577578579580581582583584585586587588589590591592593594595596597598599600601602603604605606607608609610611612613614615616617618619620621622623624625626627628629630631632633634635636637638639640641642643644645646647648649650651652653654655656657658659660