{"data":{"id":"us/40-cfr-1090.250","jurisdiction":"us","citation":"40 CFR 1090.250","heading":"Certified butane standards.","body":"Butane designated as certified butane under § 1090.1000(e) for use under the butane blending provisions of § 1090.1320(b) must meet the following per-gallon standards:\n(a) Butane content. Minimum 85 volume percent.\n(b) Benzene content. Maximum 0.03 volume percent.\n(c) Sulfur content. Maximum 10 ppm.\n(d) Chemical composition. Be composed solely of carbon, hydrogen, oxygen, nitrogen, and sulfur.","path":["Title 40—Protection of Environment","CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY","SUBCHAPTER U—AIR POLLUTION CONTROLS","PART 1090—REGULATION OF FUELS, FUEL ADDITIVES, AND REGULATED BLENDSTOCKS","Subpart C—Gasoline Standards"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-40.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:26:04Z","sha256":"aa5d5245578e0ddcc0157ba7d62d31f1bdea36a4a0ff27a941dc43717d277810","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-1090.230","next":"us/40-cfr-1090.255"},"notice":"GroundRules: Original legal text. Not legal advice."}