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:101221		Product Name:Lamivudine Separation Mixture A	CAS No.:101221-N/A	Molecular Formula:
Product Number:190231		Product Name:Polyethylene Glycol 4000	CAS No.:N/A	Molecular Formula:
Product Number:101207		Product Name:13-Ethylavitamin	CAS No.:1313741-10-4	Molecular Formula:
Product Number:190232		Product Name:Polyethylene Glycol 1000	CAS No.:N/A	Molecular Formula:
Product Number:101206		Product Name:13-cis-Avitamin A	CAS No.:69427-46-9	Molecular Formula:
Product Number:190233		Product Name:Polyethylene Glycol 600	CAS No.:N/A	Molecular Formula:
Product Number:101205		Product Name:11-cis-Avitamin A	CAS No.:1067630-53-8	Molecular Formula:
Product Number:190234		Product Name:Polyethylene Glycol 400	CAS No.:N/A	Molecular Formula:
Product Number:101204		Product Name:9-cis-avitamin A	CAS No.:419534-31-9	Molecular Formula:
Product Number:101203		Product Name:Dextro Ibuprofen	CAS No.:101203-N/A	Molecular Formula:
Product Number:101202		Product Name:Canrenone	CAS No.:976-71-6	Molecular Formula:
Product Number:190230		Product Name:Polyethylene Glycol 7000	CAS No.:N/A	Molecular Formula:
Product Number:101239		Product Name:Amidinopyrazole hydrochloride (zanamivir impurity)	CAS No.:101239-N/A	Molecular Formula:
Product Number:101238		Product Name:Zanamivir	CAS No.:139110-80-8	Molecular Formula:
Product Number:190268		Product Name:sunflower oil	CAS No.:N/A	Molecular Formula:
Product Number:101242		Product Name:Tolvaptan	CAS No.:101242-N/A	Molecular Formula:
Product Number:101241		Product Name:Lupatadine fumarate	CAS No.:182349-12-8	Molecular Formula:
Product Number:101240		Product Name:Pyrazole (zanamivir impurity)	CAS No.:101240-N/A	Molecular Formula:
Product Number:101229		Product Name:Ifenprodil tartrate	CAS No.:101229-N/A	Molecular Formula:
Product Number:190255		Product Name:aqueous solution of ethylene oxide	CAS No.:75-21-8	Molecular Formula:

1. <
2. 576
3. 577
4. 578
5. 579
6. 580
7. >
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420421422423424425426427428429430431432433434435436437438439440441442443444445446447448449450451452453454455456457458459460461462463464465466467468469470471472473474475476477478479480481482483484485486487488489490491492493494495496497498499500501502503504505506507508509510511512513514515516517518519520521522523524525526527528529530531532533534535536537538539540541542543544545546547548549550551552553554555556557558559560561562563564565566567568569570571572573574575576577578579580581582583584585586587588589590591592593594595596597598599600601602603604605606607608609610611612613614615616617618619620621622623624625626627628629630631632633634635636637638639640641642643644645646647648649650651652653654655656657658659660