§  Grades and grade requirements for the classes of Rough Rice. (See also § 868.212.) Grade Maximum limits of— Seeds and heat-damaged kernels Total (singly or combined) (Number in 500 grams) Heat-damaged kernels and objectionable seeds (singly or combined) (Number in 500 grams) Heat-damaged kernels (Number in 500 grams) Red rice and damaged kernels (singly or combined) (Percent) Chalky kernels 1 2 In long grain rice (Percent) In medium or short grain rice (Percent) Other types 3 (Percent) Color requirements 1 (minimum) U.S. No. 1 4 3 1 0.5 1.0 2.0 1.0 Shall be white or creamy. U.S. No. 2 7 5 2 1.5 2.0 4.0 2.0 May be slightly gray. U.S. No. 3 10 8 5 2.5 4.0 6.0 3.0 May be light gray. U.S. No. 4 27 22 15 4.0 6.0 8.0 5.0 May be gray or slight rosy. U.S. No. 5 37 32 25 6.0 10.0 10.0 10.0 May be dark gray or rosy. U.S. No. 6 75 75 75 4 15.0 15.0 15.0 10.0 May be dark gray or rosy. U.S. Sample grade U.S. Sample grade shall be rough rice which: (a) does not meet the requirements for any of the grades from U.S. No. 1 to U.S. No. 6, inclusive; (b) contains more than 14.0 percent of moisture; (c) is musty, or sour, or heating; (d) has any commercially objectionable foreign odor; or (e) is otherwise of distinctly low quality. 1 For the special grade Parboiled rough rice, see § 868.212(b). 2 For the special grade Glutinous rough rice, see § 868.212(d). 3 These limits do not apply to the class Mixed Rough Rice. 4 Rice in grade U.S. No. 6 shall contain not more than 6.0 percent of damaged kernels. [56 FR 55978, Oct. 31, 1991. Redesignated and amended at 60 FR 16364, Mar. 30, 1995]