Unique Ingredient Identifier
Encyclopedia
The UNique Ingredient Identifier (UNII) is a non-proprietary, free, unique, unambiguous, non-semantic, alphanumeric identifier linked to a substance’s molecular structure and/or descriptive information by the Substance Registration System of the Food and Drug Administration
(FDA). A UNII is always ten characters long, and is randomly generated, so as not to contain any inherent information on time of entry or type of substance.
The SRS is used to generate permanent, unique identifiers for substances in regulated products, such as ingredients in drug products. The system uses molecular structure and descriptive information to define a substance and generate the UNII. The primary means for defining a substance is by its molecular structure as represented on a two-dimensional plane. When a molecular structure is not available (e.g., botanicals), the UNII is defined by descriptive information.
The procedures and management of the SRS is provided by the SRS Board which includes experts from both FDA and the United States Pharmacopoeia (USP).
Food and Drug Administration
The Food and Drug Administration is an agency of the United States Department of Health and Human Services, one of the United States federal executive departments...
(FDA). A UNII is always ten characters long, and is randomly generated, so as not to contain any inherent information on time of entry or type of substance.
The SRS is used to generate permanent, unique identifiers for substances in regulated products, such as ingredients in drug products. The system uses molecular structure and descriptive information to define a substance and generate the UNII. The primary means for defining a substance is by its molecular structure as represented on a two-dimensional plane. When a molecular structure is not available (e.g., botanicals), the UNII is defined by descriptive information.
The procedures and management of the SRS is provided by the SRS Board which includes experts from both FDA and the United States Pharmacopoeia (USP).
Examples
| Preferred Term | UNII |
|---|---|
| Methadone hydrochloride | 229809935B |
| Methadone Methadone Methadone is a synthetic opioid, used medically as an analgesic and a maintenance anti-addictive for use in patients with opioid dependency. It was developed in Germany in 1937... |
UC6VBE7V1Z |
| Water Water Water is a chemical substance with the chemical formula H2O. A water molecule contains one oxygen and two hydrogen atoms connected by covalent bonds. Water is a liquid at ambient conditions, but it often co-exists on Earth with its solid state, ice, and gaseous state . Water also exists in a... |
059QF0KO0R |