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40 CFR § 417.140 - Applicability; description of the neutralization of sulfuric acid esters and sulfonic acids subcategory.

---
identifier: "/us/cfr/t40/s417.140"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 417.140 - Applicability; description of the neutralization of sulfuric acid esters and sulfonic acids subcategory."
title_number: 40
title_name: "Protection of Environment"
section_number: "417.140"
section_name: "Applicability; description of the neutralization of sulfuric acid esters and sulfonic acids subcategory."
chapter_name: "ENVIRONMENTAL PROTECTION AGENCY"
subchapter_number: "N"
subchapter_name: "EFFLUENT GUIDELINES AND STANDARDS"
part_number: "417"
part_name: "SOAP AND DETERGENT MANUFACTURING POINT SOURCE CATEGORY"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "Secs. 301, 304 (b) and (c), 306 (b) and (c), and 307(c) of the Federal Water Pollution Control Act as amended, (the Act); 33 U.S.C. 1251, 1311, 1314 (b) and (c), 1316 (b) and (c) and 1317(c), 86 Stat. 816  Pub. L. 92-500."
regulatory_source: "39 FR 13372, Apr. 12, 1974, unless otherwise noted."
cfr_part: "417"
---

# 417.140 Applicability; description of the neutralization of sulfuric acid esters and sulfonic acids subcategory.

The provisions of this subpart are applicable to discharges resulting from the continuous or batch neutralization of sulfated and sulfonated alkylbenzenes, alcohols and other materials to convert them to neutral salts.