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Clearsynth is a leading innovator in pharmaceutical reference standards, offering high-quality Reference Standards for Naphthol, including both pharmacopeial and non-pharmacopeial impurities, metabolites, stable isotope products, and nitrosamines (N-NO products). Our Naphthol impurity reference standards are invaluable for pharmaceutical research, supporting product development, ANDA and DMF submissions, quality control (QC), method validation, and stability studies. They also aid in identifying unknown impurities and assessing genotoxic potential.
Our Naphthol-related products undergo thorough characterization and are supplied with detailed Certificates of Analysis (COA) and analytical data that meet regulatory requirements. All supplied products are re-tested at regular intervals to ensure ongoing quality and compliance.

Naphthol Related Compounds

Stable Isotopes

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
5-Methoxy-2-methyl-a-naphthol-d3 Stable Isotopes CS-T-101146 79795-25-8(Unlabelled) Enquire
6-Bromo-2-naphthol-d6 Stable Isotopes CS-T-101785 Not Available Enquire


API

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Alpha-Naphtholbenzein API CS-O-43051 6948-88-5 In Stock


Metabolite

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
6-Amidino-2-naphthol Hydrochloride Metabolite CS-T-01830 66217-10-5 Enquire


Intermediate

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
5-Amino-1-naphthol Intermediate CS-O-11189 83-55-6 In Stock


Glucuronide

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
1-Naphthol 2,3,4-Tri-O-acetyl-beta-D-glucuronide Methyl Este... Glucuronide CS-T-58819 18404-55-2 Enquire
1-Naphthol-O-beta-D-Glucuronide Sodium Salt Glucuronide CS-T-59100 83833-12-9 In Stock


Fine Chemicals

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
(R)-1,1-Bi-2-naphthol Fine Chemicals CS-CU-00009 18531-94-7 In Stock
4,4'-Bi-1-naphthol Fine Chemicals CS-ED-42122 1446-34-0 Enquire


Nitrosamine

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Disodium 1-nitroso-2-naphthol-3,6-disulfate Nitrosamine CS-EP-00377 525-05-3 In Stock


Reagents

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
1-(2-Pyridylazo)-2-naphthol Reagents CS-DV-00509 85-85-8 In Stock


Stable Isotope Reagent

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
1-(2-Methoxy-d3 -phenylazo)-2-naphthol Stable Isotope Reagent CS-C-02083 1398109-09-5 Enquire
1-(4-Methyl-2-nitrophenylazo)-2-naphthol-3,4,5,6,7,8-d6 Stable Isotope Reagent CS-C-02171 Not Available Enquire
6-Amidino-2-Naphthol-13C,15N2 Hydrochloride Stable Isotope Reagent CS-BU-00132 66217-10-5 (Unlabelled) In Stock
α-Naphthol Orange (13C6) Stable Isotope Reagent CS-T-103284 523-44-4(unlabelled) Enquire


Building Blocks

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
1-Amino-8-naphthol-4-sulfonic Acid Building Blocks CS-T-66259 83-64-7 Enquire
2-Diazo-1-naphthol-5-sulfonic Acid Sodium Salt Building Blocks CS-T-102303 2657-00-3 Enquire
4-​Methoxy-​1-​naphthol Building Blocks CS-DE-01536 84-85-5 Enquire
4-Amino-2-naphthol Building Blocks CS-O-46118 90923-80-1 Enquire
Naphthol AS-LC Building Blocks CS-O-47432 4273-92-1 Enquire


Dyes

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Naphthol Yellow S Dyes CS-BX-00086 846-70-8 Enquire