Lidocaine: free base versus hydrochloride in the catalogue
2 min
Lidocaine: an explanation of the name and catalogue data, with guidance on distinguishing variants and checking documentation.
What identifies this product
The lidocaine listing gives identifier 137-58-6 and describes an amide compound also containing a tertiary amino group. This is a separate item from lidocaine hydrochloride. Data for the two forms must not be merged into a single properties table without marking the distinction.
Reference record
| Information | OCA catalogue entry |
|---|---|
| Listing name | Lidocaine |
| CAS according to the listing | 137-58-6 |
How to compare documents
Documentation should distinguish compound identity from product purpose. A material called a reagent is not automatically a certified analytical reference material. If a reference material is required, an appropriate certificate, assigned value and uncertainty statement are needed. Salt solubility parameters must not be attributed to the free base.
Example of an organised record
For Lidocaine, record the full name, identifier 137-58-6, batch number and document supplying the quality result separately in the laboratory register. Mark an absent measurement as “not stated” instead of filling it with a value from another offer. This allows the next reader to trace the data and recognise which information still requires confirmation.
Sources and catalogue variants
Editorial material based on the OCA catalogue checked on 31 October 2026. Product data remain catalogue claims. This article does not replace the current specification, certificate of analysis or manufacturer’s instructions.