Benzophenone
USP/1056130 - United States Pharmacopeia (USP) Reference Standard
Synonym: Diphenyl ketone; Diphenylmethanone; NSC 8077
CAS Number: 119-61-9
Empirical Formula (Hill Notation): C13H10O
Molecular Weight: 182.22
MDL Number: MFCD00003076
Linear Formula: (C6H5)2CO
Product Type: Chemical
| API family | benzophenone |
| application(s) | USP Biologics pharmaceutical (small molecule) |
| bp | 305 °C (lit.) |
| form | crystalline |
| format | neat |
| grade | pharmaceutical primary standard |
| InChI | 1S/C13H10O/c14-13(11-7-3- |
| InChI key | RWCCWEUUXYIKHB-UHFFFAOYSA |
| manufacturer/tradename | USP |
| mp | 47-51 °C (lit.) |
| SMILES string | O=C(C1=CC=CC=C1)C2=CC=CC= |
| vapor pressure | 1 mmHg ( 108 °C) |
| Analysis Note: | These products are for test and assay use only. They are not meant for administration to humans or animals and cannot be used to diagnose, treat, or cure diseases of any kind. |
| Application: | Benzophenone USP reference standard, intended for use in specified quality tests and assays as specified in the USP compendia. |
| General description: | Benzophenone is an aromatic ketone that serves as a photoinitiator and UV stabilizer in biologic formulations. In pharmaceutical applications, it is primarily utilized to prevent degradation of active pharmaceutical ingredients (APIs) caused by exposure to UV light. Its inclusion in biologic product formulations helps ensure the stability and longevity of these products, particularly in formulations sensitive to light-induced degradation. The United States Pharmacopeia (USP) provides quality standards for biologics to ensure their safety, efficacy, and quality throughout the manufacturing process. These standards assist manufacturers in adhering to regulatory requirements and help safeguard public health by reducing risks associated with biologics. |
| General description: | This product is provided as delivered and specified by the issuing Pharmacopoeia. All information provided in support of this product, including MSDS and any product information leaflets have been developed and issued under the Authority of the issuing Pharmacopoeia. For further information and support please go to the website of the issuing Pharmacopoeia ![]() |
| Other Notes: | Sales restrictions may apply. |
| Other Notes: | This product is part of USP Biologics Program. |
| Other Notes: | This product is provided as delivered and specified by the issuing Pharmacopoeia. All information provided in support of this product, including MSDS and any product information leaflets have been developed and issued under the Authority of the issuing Ph |
| Other Notes: | This product is provided as delivered and specified by the issuing Pharmacopoeia. All information provided in support of this product, including MSDS and any product information leaflets have been developed and issued under the Authority of the issuing Pharmacopoeia. For further information and support please go to the website of the issuing Pharmacopoeia ![]() |
| Symbol | GHS08 |
| Signal word | Warning |
| Hazard statements | H373 - H412 |
| Precautionary statements | P260 - P273 - P314 - P501 |
| RIDADR | UN 3077 9 / PGIII |
| WGK Germany | WGK 1 |
| Flash Point(F) | 280.4 °F - closed cup |
| Flash Point(C) | 138 °C - closed cup |
| bp | 305 °C (lit.) |
| mp | 47-51 °C (lit.) |
| UNSPSC | 41116107 |


