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Analytical reference standards

How to Choose an Analytical Reference Standard Supplier？

Analytical reference standards are critical components of quality assurance in laboratories. These standards are defined and supplied by manufacturers with accompanying Certificates of Analysis (COA). Key factors to consider when selecting a supplier include purity, stability, traceability, applicability, and supplier credibility. Analytical standards must exhibit high purity to ensure accuracy and reliability in test results. Additionally, they should maintain stability over time, preserving their chemical properties and concentration under specified storage conditions.

Hengyuan Fine Chemical’s PCL Brand
PCL, produced by Sichuan Purechemland Reference Materials Co., Ltd., is a trusted supplier of analytical reference standards. As a National Reference Material Development Unit, China Chemical Reagent Industry Association member, and AAA Credit Enterprise, PCL operates with full certifications:

CNAS accreditation
ISO 17034:2016 (Reference Material Producer certification)
ISO 9001:2015 (Quality Management System for R&D and sales)
Multiple independent intellectual property rights

Equipped with advanced analytical instruments (e.g., LC, LC-MS, GC, NMR, IR spectroscopy, automatic potentiometric titrators, UV spectrophotometers), PCL ensures homogeneous materials, precisely characterized values, and COA-certified products，Purity≥99%. We offer custom synthesis services, factory-direct pricing, stable supply chains, and dedicated post-sales support.

Product Number	Product Name	CAS No.	Molecular Formula
Product Number:1ST2513-100mg	Product Name:Isobutyl para-hydroxybenzoate	CAS No.:4247-02-3	Molecular Formula:
Product Number:1ST2511-100mg	Product Name:Propyl para-hydroxybenzoate	CAS No.:94-13-3	Molecular Formula:
Product Number:1ST2539-100mg	Product Name:Isopropyl para-hydroxybenzoate	CAS No.:4191-73-5	Molecular Formula:
Product Number:1ST2510-100mg	Product Name:Ethyl para-hydroxybenzoate	CAS No.:120-47-8	Molecular Formula:
Product Number:1ST2505-100mg	Product Name:Dehydroacetic acid	CAS No.:520-45-6	Molecular Formula:
Product Number:1ST10488-100mg	Product Name:Chlorphenesin	CAS No.:104-29-0	Molecular Formula:
Product Number:1ST2509K-100mg	Product Name:Methyl 4-hydroxybenzoate potassium salt	CAS No.:26112-07-2	Molecular Formula:
Product Number:1ST2157-10mg	Product Name:methylchloroisothiazolinone	CAS No.:26172-55-4	Molecular Formula:
Product Number:1ST2535-100mg	Product Name:Para-hydroxybenzoic acid	CAS No.:99-96-7	Molecular Formula:
Product Number:1ST21088-100mg	Product Name:bromanitol	CAS No.:52-51-7	Molecular Formula:
Product Number:1ST7033Z-100μg	Product Name:Cefadroxil D5 hydrate	CAS No.:2101505-56-8 (Anhydrous)	Molecular Formula:
Product Number:1ST000718-100mg	Product Name:4-amino-3-nitrophenol	CAS No.:610-81-1	Molecular Formula:
Product Number:1ST2903-100mg	Product Name:2-aminophenol	CAS No.:95-55-6	Molecular Formula:
Product Number:1ST000710-100mg	Product Name:2-Chloro-p-phenylenediamine sulfate	CAS No.:61702-44-1	Molecular Formula:
Product Number:1ST4130D3Z-100μg	Product Name:Doxycycline-D3 monohydrochloride hemiethanol hydrate	CAS No.:NA	Molecular Formula:
Product Number:1ST4123D6AZ-100μg	Product Name:Minocycline-D6 hydrochloride	CAS No.:1036070-10-6 (Free base)	Molecular Formula:
Product Number:1ST40353-100mg	Product Name:p-Phenylenedimethylene bis(camphorsulfonate)	CAS No.:92761-26-7	Molecular Formula:
Product Number:1ST3418-100mg	Product Name:O'Crillin	CAS No.:6197-30-4	Molecular Formula:
Product Number:1ST3426-100mg	Product Name:Methylenebis-benzotriazolyltetramethylbutylphenol	CAS No.:103597-45-1	Molecular Formula:
Product Number:1ST3423-100mg	Product Name:Isopentyl 4-methoxycinnamate	CAS No.:71617-10-2	Molecular Formula: