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.

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

Product Number	Image	Product Name	CAS No.	Molecular Formula
Product Number:GBW(E)083971		Product Name:Ammonia nitrogen solution in water standard substance 1	CAS No.:	Molecular Formula:
Product Number:GBW(E)082048		Product Name:Chloride ion component analysis standard substance in water	CAS No.:	Molecular Formula:
Product Number:PCL-#-Rd006		Product Name:Salicylic Acid Melting Point Standard	CAS No.:	Molecular Formula:
Product Number:GBW(E)120194		Product Name:Water turbidity solution standard substance 2	CAS No.:	Molecular Formula:
Product Number:GBW(E)120125		Product Name:Water turbidity solution standard substance 1	CAS No.:	Molecular Formula:
Product Number:GBW(E)130342		Product Name:Mixed Phosphate pH Standard 2	CAS No.:	Molecular Formula:
Product Number:GBW(E)130341		Product Name:Mixed Phosphate pH Standard 1	CAS No.:	Molecular Formula:
Product Number:GBW(E)130343		Product Name:Borax pH Standard	CAS No.:	Molecular Formula:
Product Number:GBW(E)082644		Product Name:Iodide ion solution standard substance	CAS No.:	Molecular Formula:
Product Number:PCL-#-Rd018		Product Name:Sulfadimethoxine Melting Point Standard	CAS No.:	Molecular Formula:
Product Number:PCL-#-Rd007		Product Name:Sulfonamide Melting Point Standard	CAS No.:	Molecular Formula:
Product Number:PCL-#-Rd010		Product Name:Saccharin Melting Point Standard	CAS No.:	Molecular Formula:
Product Number:PCL-#-Rd023		Product Name:Biphenyl Melting Point Standard	CAS No.:	Molecular Formula:
Product Number:PCL-#-Rd004		Product Name:Benzoic Acid Melting Point Standards	CAS No.:	Molecular Formula:
Product Number:PCL-#-Rd014		Product Name:Naphthalene Melting Point Standards	CAS No.:	Molecular Formula:
Product Number:PCL-#-Rd017		Product Name:Anthracene Melting Point Standards	CAS No.:	Molecular Formula:
Product Number:PCL-#-Rd009		Product Name:Anthraquinone Melting Point Standards	CAS No.:	Molecular Formula:
Product Number:GBW(E)130340		Product Name:Potassium Hydrogen Phthalate pH Standard	CAS No.:	Molecular Formula:
Product Number:PCL-#-Rd013		Product Name:Phenolphthalein Melting Point Standard	CAS No.:	Molecular Formula:
Product Number:GBW(E)083809		Product Name:Potassium dichromate volumetric analysis solution standard substance	CAS No.:	Molecular Formula:

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