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:		Product Name:Atraton	CAS No.:1610-17-9	Molecular Formula:
Product Number:		Product Name:Asulam	CAS No.:3337-71-1	Molecular Formula:
Product Number:		Product Name:Anilofos	CAS No.:64249-01-0	Molecular Formula:
Product Number:		Product Name:Anilazine	CAS No.:101-05-3	Molecular Formula:
Product Number:		Product Name:Amitrole	CAS No.:61-82-5	Molecular Formula:
Product Number:		Product Name:Amitraz	CAS No.:33089-61-1	Molecular Formula:
Product Number:		Product Name:Aminocarb in Acetonitrile	CAS No.:2032-59-9	Molecular Formula:
Product Number:		Product Name:Amidosulfuron	CAS No.:120923-37-7	Molecular Formula:
Product Number:		Product Name:Ametryn	CAS No.:834-12-8	Molecular Formula:
Product Number:		Product Name:Aldicarb sulfoxid	CAS No.:1646-87-3	Molecular Formula:
Product Number:		Product Name:Aldicarb-sulfone	CAS No.:1646-88-4	Molecular Formula:
Product Number:		Product Name:Alachlor	CAS No.:15972-60-8	Molecular Formula:
Product Number:		Product Name:Acrinathrin	CAS No.:101007-06-1	Molecular Formula:
Product Number:		Product Name:Aclonifen	CAS No.:74070-46-5	Molecular Formula:
Product Number:		Product Name:Cycloheximide	CAS No.:66-81-9	Molecular Formula:
Product Number:		Product Name:Acibenzolar-S-methyl	CAS No.:135158-54-2	Molecular Formula:
Product Number:		Product Name:Acetamiprid	CAS No.:135410-20-7	Molecular Formula:
Product Number:		Product Name:Abamectin	CAS No.:71751-41-2	Molecular Formula:
Product Number:		Product Name:2.3.5-Trimethylphenyl methyl carbamate	CAS No.:2655-15-4	Molecular Formula:
Product Number:		Product Name:Threo-Chloramphenicol-D5	CAS No.:202480-68-0	Molecular Formula:

1. <
2. 24
3. 25
4. 26
5. 27
6. 28
7. >
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420421422423424425426427428429430431432433434435436437438439440441442443444445446447448449450451452453454455456457458459460461462463464465466467468469470471472473474475476477478479480481482483484485486487488489490491492493494495496497498499500501502503504505506507508509510511512513514515516517518519520521522523524525526527528529530531532533534535536537538539540541542543544545546547548549550551552553554555556557558559560561562563564565566567568569570571572573574575576577578579580581582583584585586587588589590591592593594595596597598599600601602603604605606607608609610611612613614615616617618619620621622623624625626627628629630631632633634635636637638639640641642643644645646647648649650651652653654655656657658659660661662663664665666667668669670671672673674675676677678679680681682683684685686687688689690