40 CFR § 1090.250 - Certified butane standards.

---
identifier: "/us/cfr/t40/s1090.250"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 1090.250 - Certified butane standards."
title_number: 40
title_name: "Protection of Environment"
section_number: "1090.250"
section_name: "Certified butane standards."
chapter_name: "ENVIRONMENTAL PROTECTION AGENCY"
subchapter_number: "U"
subchapter_name: "AIR POLLUTION CONTROLS"
part_number: "1090"
part_name: "REGULATION OF FUELS, FUEL ADDITIVES, AND REGULATED BLENDSTOCKS"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "42 U.S.C. 7414, 7521, 7522-7525, 7541, 7542, 7543, 7545, 7547, 7550, and 7601."
regulatory_source: "85 FR 78469, Dec. 4, 2020, unless otherwise noted."
cfr_part: "1090"
---


# 1090.250 Certified butane standards.

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:

(a) *Butane content.* Minimum 85 volume percent.

(b) *Benzene content.* Maximum 0.03 volume percent.

(c) *Sulfur content.* Maximum 10 ppm.

(d) *Chemical composition.* Be composed solely of carbon, hydrogen, oxygen, nitrogen, and sulfur.