---
kind: "section"
citation: "15 C.F.R. § 230.2"
title: "15"
number: "230.2"
heading: "Identification of Standard Reference Materials."
url: "https://uscodex.org/cfr/15/230.2"
---

# §230.2. Identification of Standard Reference Materials.


The SRM's are listed by category in SP 260 and by sequential number in the supplements. The number uniquely identifies a particular SRM. Renewals are indicated by the addition of a letter to the original number. Thus, 11a is the first, 11b the second, and 11c the third renewal of SRM 11, Basic Open-Hearth Steel, 0.2 percent carbon. In this way, a particular number or number and letter always represent a material of fixed or approximately fixed composition.


## Notes

### Authority

Authority: Sec. 9, 31 Stat. 1450, as amended; 15 U.S.C. 277. Interprets and applies sec. 7, 70 Stat. 959; 15 U.S.C. 275a.

### Source

Source: 41 FR 8472, Feb. 27, 1976, unless otherwise noted.