The TLV-TWA (10 ppm or 29 mg/m3[ACGIH,1997]) for NF3 was set by the American Conference of Governmental Industrial Hygienists at one-tenth the test level of the previously cited 19-week study under Toxicological Properties.

• 美国政府工业卫生学者会议把NF3的TLV-TWA (10 ppm或29 mg/m3[ACGIH,1997])设定为前面在“毒物学性质”下引用的19周研究的测试水平的十分之一。