CHLORINATED AND ORGANONITROGEN HERBICIDES (PATCH): METHOD 9201, Issue 1, dated 15 January 1998 - Page 5 of 11
TABLE 1. SYNONYMS, FORMULA, MOLECULAR WEIGHT, PROPERTIES Empirical Formula
Molecular Weight
Solubility in Water (mg/L)
LD50 mg/kg
Alachlor 2-Chloro-N-(2,6-diethylphenyl)-N-(methoxymethyl)acetamide CAS #15972-60-8 RTECS AE1225000
C14H20ClNO2
269.77
Colorless crystals; d 1.133 g/mL@ 25 C; MP 39.541.5 C; VP 0.0029 Pa (2.2 x 10-5 mm Hg) @ 25 C
140 @23 C
1200
Atrazine 6-Chloro-N-ethyl-N’-isopropyl-1,3,5-triazine-2,4-diamine CAS # 1912-24-9 RTECS XY5600000
C8H14ClN5
215.68
Colorless crystals; MP 173-175 C; VP 4 x 10-5 Pa (3.0 x 10-7 mm Hg) @ 20 C
70 @ 25 C
1780
Cyanazine 2[[4-chloro-6-(ethylamino)-1,3,5-triazin-2-yl]amino]-2methylpropionitrile CAS #21725-46-2 RTECS UG1490000
C9H13ClN6
240.69
White crystalline solid; MP 167.5-169 C; VP 2.1 x 10-7 Pa (1.6 x 10-9 mm Hg) @ 20 C
171 @ 25 C
182
2,4-D acid 2,4-Dichlorophenoxyacetic acid CAS #94-75-7 RTECS AG6825000
C8H6Cl2O3
221.04
White powder; MP 140.5 C; <10-5 Pa (<7.5 x 10-8 mm Hg) @ 25 C
almost insoluble
375
2,4-D, ME 2,4-Dichorophenoxyacetic acid, methyl ester CAS #1928-38-7
C9H8Cl2O3
235.07
2,4-D, BE 2,4-Dichlorophenoxyacetic, 2-butoxyethyl ester CAS #1929-73-3 RTECS AG7700000
C14H18Cl2O4
321.20
150
2,4-D, EH 2,4-2,4-Dichlorophenoxyacetic acid, 2-ethylhexylester CAS #1928-43-4
C16H22Cl2O3
333.25
300 1000
Metolachlor 2-Chloro-N-(2-ethyl-6-methylphenyl)-N-(2-methoxy-1methylethyl)acetamide CAS #51218-45-2 RTECS AN3430000
C15H22Cl2O3
283.80
Odorless tan liquid; 0.0017 Pa (1.3 x 10-5 mm Hg) @ 20 C
530 @ 20 C
2780
Simazine 6-Chloro-N,N’-diethyl-1,3,5-trazine-2,4-diamine CAS #122-34-9 RTECS XY5250000
C7H12ClN5
201.66
Crystals; MP 225 -227 C; 8.1 x 10-7 Pa (6.1 x 10-7 mm Hg) @ 20 C
3.5 @ 20 C
5000
Name / Synonym
NIOSH Manual of Analytical Methods (NMAM), Fourth Edition
Physical Properties
TWA (mg/m3)
NIOSH 5 ACGIH 5
NIOSH 10 ACGIH 10 OSHA 10
