Clearsynth is a leading innovator in pharmaceutical reference standards, offering high-quality Reference Standards for Diphenhydramine, including both pharmacopeial and non-pharmacopeial impurities, metabolites, stable isotope products, and nitrosamines (N-NO products). Our Diphenhydramine 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 Diphenhydramine-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 Diphenhydramine-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.
Diphenhydramine Related Compounds
Stable Isotopes
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| Diphenhydramine-d3 Dimer | Stable Isotopes | CS-T-102697 | 445393-68-0(Unlabelled) | Enquire |
| Diphenhydramine-d3 Dimer Hydrochloride | Stable Isotopes | CS-O-50136 | Not Available | In Stock |
| Diphenhydramine-d5 Hydrochloride | Stable Isotopes | CS-O-06550 | 1219795-16-0 | In Stock |
| Diphenhydramine-d6 Hydrochloride | Stable Isotopes | CS-ED-01727 | 1189986-72-8 | In Stock |
| Diphenhydramine-d6 N-Oxide | Stable Isotopes | CS-T-98468 | 1346603-42-6 | Enquire |
| Diphenhydramine-d6 N-β-D-Glucuronide | Stable Isotopes | CS-T-98469 | Not Available | Enquire |
| N-Desmethyl Diphenhydramine-d3 | Stable Isotopes | CS-O-50283 | 1795121-76-4 | In Stock |
| N-Nitroso Desmethyldiphenhydramine-d3 | Stable Isotopes | CS-T-104122 | Not Available | In Stock |
| N-Nitroso N-Desmethyl Diphenhydramine-d5 [Mixture of isomers... | Stable Isotopes | CS-O-41341 | 55855-43-1(Unlabeled) | In Stock |
| Diphenhydramine D5 | Stable Isotopes | CS-P-08287 | Not Available | Enquire |
| N-Desmethyl Diphenhydramine-d3 Hydrochloride | Stable Isotopes | CS-T-88964 | 1794759-12-8 | Enquire |
API
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| Diphenhydramine | API | CS-T-93423 | 58-73-1 | In Stock |
| Diphenhydramine Hydrochloride | API | CS-O-10860 | 147-24-0 | In Stock |
Metabolite
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| Diphenhydramine N-Oxide | Metabolite | CS-O-11820 | 3922-74-5 | In Stock |
| Diphenhydramine-N-oxide hydrochloride | Metabolite | CS-DH-00007 | 13168-00-8 | Enquire |
| N-acetyl N-desmethyldiphenhydramine | Metabolite | CS-O-34805 | 109881-19-8 | Enquire |
Impurity
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| 4-Bromodiphenhydramine | Impurity | CS-EO-01833 | 118-23-0 | In Stock |
| Diphenhydramine EP impurity A | Impurity | CS-T-53824 | 17471-10-2 | In Stock |
| Diphenhydramine Impurity B | Impurity | CS-CY-00018 | 4024-34-4 | In Stock |
| Diphenhydramine impurity C | Impurity | CS-O-30389 | 1808-12-4 | In Stock |
| Diphenhydramine Impurity D | Impurity | CS-CY-00074 | 91-01-0 | In Stock |
| Diphenhydramine methiodide | Impurity | CS-EO-02929 | 14177-81-2 | Enquire |
| Diphenhydramine Related Compound A | Impurity | CS-M-53270 | 53499-40-4 | In Stock |
| N-methylated diphenhydramine | Impurity | CS-O-46262 | 29869-74-7 | In Stock |
Intermediate
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| Benzhydryl bromide | Intermediate | CS-O-11372 | 776-74-9 | In Stock |
Glucuronide
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| Diphenhydramine N-Glucuronide | Glucuronide | CS-P-09004 | 137908-78-2 | In Stock |
Fine Chemicals
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| Diphenhydramine Quaternary Salt | Fine Chemicals | CS-O-36072 | 857158-22-6 | Enquire |
Nitrosamine
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| N-Nitroso N-Desmethyl Diphenhydramine (Mixture of isomers) | Nitrosamine | CS-O-38640 | 55855-43-1 | In Stock |
Secondary Standards
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| Diphenhydramine Citrate | Secondary Standards | CS-SS-25163-1GM | 88637-37-0 | Enquire |
| Diphenhydramine hydrochloride | Secondary Standards | CS-SS-26593 | 147-24-0 | Enquire |
| Diphenhydramine hydrochloride | Secondary Standards | CS-SS-24075-1GM | 147-24-0 | Enquire |
| Diphenhydramine Impurity B | Secondary Standards | CS-SS-24829-50MG | 4024-34-4 | Enquire |
| Diphenhydramine N-Oxide Hydrochloride | Secondary Standards | CS-SS-24830-50MG | 13168-00-8 | Enquire |
| Diphenhydramine Related Compound A | Secondary Standards | CS-SS-24919-50MG | 53499-40-4 | Enquire |
| Diphenhydramine Related Compound B | Secondary Standards | CS-SS-24831-50MG | 19574-66-4 | Enquire |
Stable Isotope Reagent
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| Benzophenone-13C | Stable Isotope Reagent | CS-T-95661 | 32488-48-5 | Enquire |
Analytical Standard
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| N-Nitroso N-Desmethyl Diphenhydramine (Mixture of isomers) | Analytical Standard | CS-O-38640-10MG | 55855-43-1 | Enquire |
| N-nitroso-desmethyl-diphenhydramine-100 PPM in Acetonitrile | Analytical Standard | CS-O-38640-1.5ML | 55855-43-1 | Enquire |