{"data":{"id":"us/15-cfr-230.2","jurisdiction":"us","citation":"15 CFR 230.2","heading":"Identification of Standard Reference Materials.","body":"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.","path":["Title 15—Commerce and Foreign Trade","Subtitle B—Regulations Relating to Commerce and Foreign Trade","CHAPTER II—NATIONAL INSTITUTE OF STANDARDS AND TECHNOLOGY, DEPARTMENT OF COMMERCE","SUBCHAPTER B—STANDARD REFERENCE MATERIALS","PART 230—STANDARD REFERENCE MATERIALS","Subpart A—General Information"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-15.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:24:24Z","sha256":"50c4603a898582862ec9dfc4a6aa1e8de99f28d5f65f4d864baab8e91e5812c1","source_id":"us-cfr","stale":true,"prev":"us/15-cfr-230.1","next":"us/15-cfr-230.3"},"notice":"GroundRules: Original legal text. Not legal advice."}