7 CFR § 205.602 - Nonsynthetic substances prohibited for use in organic crop production.
---
identifier: "/us/cfr/t7/s205.602"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "7 CFR § 205.602 - Nonsynthetic substances prohibited for use in organic crop production."
title_number: 7
title_name: "Agriculture"
section_number: "205.602"
section_name: "Nonsynthetic substances prohibited for use in organic crop production."
chapter_name: "AGRICULTURAL MARKETING SERVICE (STANDARDS, INSPECTIONS, MARKETING PRACTICES), DEPARTMENT OF AGRICULTURE"
subchapter_number: "M"
subchapter_name: "ORGANIC FOODS PRODUCTION ACT PROVISIONS"
part_number: "205"
part_name: "NATIONAL ORGANIC PROGRAM"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "7 U.S.C. 6501-6524."
regulatory_source: "65 FR 80637, Dec. 21, 2000, unless otherwise noted."
cfr_part: "205"
---
# 205.602 Nonsynthetic substances prohibited for use in organic crop production.
The following nonsynthetic substances may not be used in organic crop production:
(a) Ash from manure burning.
(b) Arsenic.
(c) Calcium chloride, brine process is natural and prohibited for use except as a foliar spray to treat a physiological disorder associated with calcium uptake.
(d) Lead salts.
(e) Potassium chloride—unless derived from a mined source and applied in a manner that minimizes chloride accumulation in the soil.
(f) Rotenone (CAS # 83-79-4).
(g) Sodium fluoaluminate (mined).
(h) Sodium nitrate—unless use is restricted to no more than 20% of the crop's total nitrogen requirement; use in spirulina production is unrestricted until October 21, 2005.
(i) Strychnine.
(j) Tobacco dust (nicotine sulfate).
[68 FR 61992, Oct. 31, 2003, as amended at 83 FR 66572, Dec. 27, 2018]