Clearsynth is a leading innovator in pharmaceutical reference standards, offering high-quality Reference Standards for Naproxen, including both pharmacopeial and non-pharmacopeial impurities, metabolites, stable isotope products, and nitrosamines (N-NO products). Our Naproxen 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 Naproxen-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.
Our Naproxen-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.
Naproxen Related Compounds
Stable Isotopes
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| (±)-Naproxen-d3 | Stable Isotopes | CS-W-00255 | 958293-77-1 | In Stock |
| (S)-Naproxen-d3 | Stable Isotopes | CS-T-59127 | 1094102-82-5 | In Stock |
| 2-Naphthaleneacetic acid, 6-(methoxy-d3)-a-methyl-, methyl-d... | Stable Isotopes | CS-O-47977 | Not Available | Enquire |
| Naproxen 13 C D3 | Stable Isotopes | CS-EO-02553 | Not Available | Enquire |
| Naproxen-1,3,4,5,7,8-d6 | Stable Isotopes | CS-DZ-00511 | 958293-99-7 | Enquire |
| Naproxen-13C,d3 | Stable Isotopes | CS-O-10120 | 1261392-52-2 | In Stock |
| Rac Naproxen D3 Ethyl ester | Stable Isotopes | CS-O-48831 | 1122399-97-6 | Enquire |
| rac Naproxen-d3 (Methoxy-d3) | Stable Isotopes | CS-O-02891 | 958293-79-3 | In Stock |
| rac-5-Bromo Naproxen-13CD3 | Stable Isotopes | CS-T-97735 | Not Available | Enquire |
| rac-5-Chloro Naproxen-13CD3 | Stable Isotopes | CS-T-97695 | Not Available | Enquire |
| rac-Naproxen 2-Propyl Ester-d3 | Stable Isotopes | CS-T-102194 | Not Available | Enquire |
| rac-Naproxen Methyl Ester-13C,d3 | Stable Isotopes | CS-T-102195 | Not Available | Enquire |
| rac-Naproxen-13C3 | Stable Isotopes | CS-T-103742 | 23981-80-8(unlabelled) | Enquire |
| (S)-Naproxen Ethyl-d5 Ester | Stable Isotopes | CS-T-83449 | 1346617-42-2 | Enquire |
| rac Naproxen-d3 Methyl Ester | Stable Isotopes | CS-T-59132 | 1189511-76-9 | Enquire |
| rac O-Desmethyl Naproxen D3 | Stable Isotopes | CS-T-52257 | 1122399-99-8 | Enquire |
| rac-Naproxen 13C,d3 | Stable Isotopes | CS-T-59129 | 1216704-11-8 | Enquire |
API
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| (S)-Naproxen | API | CS-O-30671 | 22204-53-1 | In Stock |
| Naproxen Sodium | API | CS-O-11178 | 26159-34-2 | In Stock |
Metabolite
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| 2-Acetyl-6-methoxynaphthalene | Metabolite | CS-O-10938 | 3900-45-6 | In Stock |
| Naproxen EP Impurity A | Metabolite | CS-T-52256 | 52079-10-4 | In Stock |
| O-Desmethyl Naproxen | Metabolite | CS-O-07948 | 52079-10-4 | In Stock |
Impurity
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| (S)-5-Bromo Naproxen | Impurity | CS-T-49825 | 84236-26-0 | In Stock |
| (S)-Naproxen 2-Propyl Ester | Impurity | CS-T-59134 | 156967-24-7 | In Stock |
| 2-Bromo-6-methoxynaphthalene (Naproxen Impurity N) | Impurity | CS-O-10943 | 5111-65-9 | In Stock |
| 6-(3-hydroxy-2,2-dimethylpropoxy) Naproxen | Impurity | CS-O-43804 | 2601735-81-1 | Enquire |
| 6-(3-hydroxy-2,2-dimethylpropoxy) Naproxen Sodium salt impur... | Impurity | CS-O-54030 | 2601735-81-1 (Freebase) | In Stock |
| Desmethyl Naproxen | Impurity | CS-ZG-21943 | 60756-73-2 | Enquire |
| Naproxen 1,2-Propylene Glycol Esters (Mixture of Isomers) | Impurity | CS-EO-01568 | Not Available | Enquire |
| Naproxen Glycerol Ester Impurity | Impurity | CS-EO-01569 | 38835-17-5 | In Stock |
| Naproxen chloride | Impurity | CS-EL-00024 | 51091-84-0 | Enquire |
| Naproxen EP Impurity D | Impurity | CS-T-56748 | 116883-62-6 | In Stock |
| Naproxen EP Impurity H | Impurity | CS-O-11996 | 5111-66-0 | In Stock |
| Naproxen EP Impurity J | Impurity | CS-T-32436 | 21388-17-0 | In Stock |
| Naproxen EP Impurity M | Impurity | CS-T-32586 | 93-04-9 | In Stock |
| Naproxen Impurity 5 | Impurity | CS-O-56929 | 358369-77-4 | Enquire |
| Naproxen Impurity F | Impurity | CS-DH-00018 | 31220-35-6 | In Stock |
| Naproxen Impurity K | Impurity | CS-O-10941 | 77301-42-9 | In Stock |
| Naproxen Sodium impurity E | Impurity | CS-O-15561 | 26159-35-3 | In Stock |
| rac Naproxen 2-Propyl Ester | Impurity | CS-T-83596 | 68641-85-0 | Enquire |
| Rac-5-Bromo Naproxen Sodium salt | Impurity | CS-O-56882 | 89586-52-7 | Enquire |
| (R)-5-Bromo Naproxen | Impurity | CS-T-49824 | 92471-85-7 | Enquire |
| (R)-5-Chloro Naproxen | Impurity | CS-T-50861 | 92471-86-8 | Enquire |
| (S)-5-Chloro Naproxen | Impurity | CS-T-50862 | 89617-86-7 | Enquire |
| 2,2'-(7,7'-dimethoxy-[1,1'-binaphthalene]-3,3'-diyl)dipropio... | Impurity | CS-O-37783 | Not Available | Enquire |
| Naproxen Impurity 1 | Impurity | CS-P-08721 | Not Available | Enquire |
| Naproxen Impurity 11 | Impurity | CS-P-08754 | 116883-61-5 | Enquire |
| Naproxen Impurity 6 | Impurity | CS-EO-01440 | Not Available | Enquire |
| rac-5-Bromo Naproxen | Impurity | CS-T-49823 | 27655-95-4 | Enquire |
| rac-5-Chloro Naproxen | Impurity | CS-T-50859 | 60424-17-1 | Enquire |
Glucuronide
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| (S)-Naproxen Acyl-beta-D-glucuronide | Glucuronide | CS-T-59130 | 41945-43-1 | In Stock |
| (R)-Naproxen Acyl-ß-D-glucuronide | Glucuronide | CS-T-59126 | 112828-15-6 | Enquire |
| (R)-Naproxen Acyl-ß-D-glucuronide Benzyl Ester | Glucuronide | CS-T-59131 | 946517-36-8 | Enquire |
| (S)-Naproxen Iso-acyl-β-D-glucuronide | Glucuronide | CS-T-59133 | 219476-92-3 | Enquire |
| Demethyl Naproxen Acyl-β-D-glucuronide | Glucuronide | CS-T-51870 | 91488-21-0 | Enquire |
| Naproxen Acyl-b-D-glucuronide | Glucuronide | CS-O-07949 | 41945-43-1 | Enquire |
Fine Chemicals
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| 6-Methoxy-2-naphthoic Acid | Fine Chemicals | CS-T-32602 | 2471-70-7 | In Stock |
| 6-Methoxy-2-naphthyl acetic Acid | Fine Chemicals | CS-O-05854 | 23981-47-7 | In Stock |
| 1-(3-Methoxynaphthalen-2-yl)ethan-1-one | Fine Chemicals | CS-O-38567 | 17056-94-9 | Enquire |
| 2-Butyl Chloroacetate | Fine Chemicals | CS-O-34345 | 17696-64-9 | Enquire |
| 2-Cyano-6-methoxynaphthalene | Fine Chemicals | CS-M-00471 | 67886-70-8 | Enquire |
| 6-Methoxy-alpha-methylnaphthalen-1-acetaldehyde | Fine Chemicals | CS-ZH-42136 | 27602-75-1 | 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 |
Secondary Standards
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| Naproxen | Secondary Standards | CS-SS-24096-500MG | 22204-53-1 | Enquire |
| Naproxen 1,2 Propylene Glycol Esters | Secondary Standards | CS-SS-25119 | 288.34 | Enquire |
| Naproxen 1,2,3 Propanetriol Esters | Secondary Standards | CS-SS-25151-50MG | Not Available | Enquire |
| Naproxen 1,3-Butylene Glycol Esters | Secondary Standards | CS-SS-25153 | 302.36 | Enquire |
| Naproxen Impurity A | Secondary Standards | CS-SS-25345-100MG | 52079-10-4 | Enquire |
| Naproxen Impurity B | Secondary Standards | CS-SS-25344-100MG | 89617-86-7 | Enquire |
| Naproxen Impurity C | Secondary Standards | CS-SS-25343-100MG | 84236-26-0 | Enquire |
| Naproxen Impurity E | Secondary Standards | CS-SS-25353-100MG | 26159-35-3 | Enquire |
| Naproxen Impurity F | Secondary Standards | CS-SS-25352-100MG | 31220-35-6 | Enquire |
| Naproxen Impurity H | Secondary Standards | CS-SS-25350-100MG | 5111-66-0 | Enquire |
| Naproxen Impurity I | Secondary Standards | CS-SS-25346-100MG | 23981-47-7 | Enquire |
| Naproxen Impurity J | Secondary Standards | CS-SS-26009-50MG | 21388-17-0 | Enquire |
| Naproxen Impurity M | Secondary Standards | CS-SS-25349-100MG | 93-04-9 | Enquire |
| Naproxen Impurity N | Secondary Standards | CS-SS-25348-100MG | 5111-65-9 | Enquire |
| Naproxen Isopropyl Ester | Secondary Standards | CS-SS-25154 | 156967-24-7 | Enquire |
| Naproxen Related Compound A | Secondary Standards | CS-SS-25351-100MG | Not Available | Enquire |
| Naproxen Related Compound G | Secondary Standards | CS-SS-25342-100MG | 23979-41-1 | Enquire |
| Naproxen Related Compound K | Secondary Standards | CS-SS-25341-100MG | 77301-42-9 | Enquire |
| Naproxen Related Compound L | Secondary Standards | CS-SS-25347-100MG | 3900-45-6 | Enquire |
| Naproxen sodium | Secondary Standards | CS-SS-24202-1GM | 26159-34-2 | Enquire |
| rac-Naproxen | Secondary Standards | CS-SS-25354-100MG | 23981-80-8 | Enquire |
Building Blocks
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| 1-(7-methoxynaphthalen-1-yl)ethan-1-one | Building Blocks | CS-ZB-16237 | 3453-55-2 | Enquire |
Chiral
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| (R)-Naproxen | Chiral | CS-T-59125 | 23979-41-1 | In Stock |
| rac-Naproxen | Chiral | CS-O-10952 | 23981-80-8 | In Stock |