7 CFR § 810.404 - Grades and grade requirements for corn.

---
identifier: "/us/cfr/t7/s810.404"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "7 CFR § 810.404 - Grades and grade requirements for corn."
title_number: 7
title_name: "Agriculture"
section_number: "810.404"
section_name: "Grades and grade requirements for corn."
chapter_name: "AGRICULTURAL MARKETING SERVICE (FEDERAL GRAIN INSPECTION SERVICE, FAIR TRADE PRACTICES PROGRAM), DEPARTMENT OF AGRICULTURE"
subchapter_number: "A"
subchapter_name: "FEDERAL GRAIN INSPECTION"
part_number: "810"
part_name: "OFFICIAL UNITED STATES STANDARDS FOR GRAIN"
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. 71-87k."
regulatory_source: "52 FR 24418, June 30, 1987, unless otherwise noted."
cfr_part: "810"
---


# 810.404 Grades and grade requirements for corn.

|  |  |  |  |  |
| --- | --- | --- | --- | --- |
| U.S. No. 1 | 56.0 | 0.1 | 3.0 | 2.0 |
| U.S. No. 2 | 54.0 | 0.2 | 5.0 | 3.0 |
| U.S. No. 3 | 52.0 | 0.5 | 7.0 | 4.0 |
| U.S. No. 4 | 49.0 | 1.0 | 10.0 | 5.0 |
| U.S. No. 5 | 46.0 | 3.0 | 15.0 | 7.0 |
| U.S. Sample Grade |  |  |  |  |
| U.S. Sample grade is corn that: |  |  |  |  |
| (a) Does not meet the requirements for the grades U.S. Nos. 1, 2, 3, 4, or 5; or |  |  |  |  |
| (b) Contains stones with an aggregate weight in excess of 0.1 percent of the sample weight, 2 or more pieces of glass, 3 or more crotalaria seeds (Crotalaria spp.), 2 or more castor beans (Ricinus communis L.), 4 or more particles of an unknown foreign substance(s)or a commonly recognized harmful or toxic substance(s), 8 or more cockleburs (Xanthium spp.), or similar seeds singly or in combination, or animal filth in excess of 0.20 percent in 1,000 grams; or |  |  |  |  |
| (c) Has a musty, sour, or commercially objectionable foreign odor; or |  |  |  |  |
| (d) Is heating or otherwise of distinctly low quality. |  |  |  |  |

[60 FR 61196, Nov. 29, 1995]