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Chemical: Abamectin
Use category: Insecticide
Content & formulation: Abamectin 95% TC,Abamectin 1.8% EC
Common name abamectin (BSI, draft E-ISO, ANSI); abamectine ((f) draft F-ISO)
IUPAC name (10E,14E,16E,22Z)-(1R,4S,5'S,6S,6'R,8R,12S,13S,20R,21R,24S)-6'-[(S)-sec-butyl]-21,24-dihydroxy-5',11,13,22-tetramethyl-2-oxo-3,7,19-trioxatetracyclo[15.6.1.14,8.020,24]pentacosa-10,14,16,22-tetraene-6-spiro-2'-(5',6'-dihydro-2'H-pyran)-12-yl 2,6-dideoxy-4-O-(2,6-dideoxy-3-O-methyl-a-L-arabino-hexopyranosyl)-3-O-methyl-a-L-arabino-hexopyranoside (i) mixture with (10E,14E,16E,22Z)-(1R,4S,5'S,6S,6'R,8R,12S,13S,20R,21R,24S)-21,24-dihydroxy-6'-isopropyl-5',11,13,22-tetramethyl-2-oxo-3,7,19-trioxatetracyclo[15.6.1.14,8.020,24]pentacosa-10,14,16,22-tetraene-6-spiro-2'-(5',6'-dihydro-2'H-pyran)-12-yl 2,6-dideoxy-4-O-(2,6-dideoxy-3-O-methyl-a-L-arabino-hexopyranosyl)-3-O-methyl-a-L-arabino-hexopyranoside (ii) (4:1)
Chemical Abstracts name 5-O-demethylavermectin A1a (i) mixture with 5-O-demethyl-25-de(1-methylpropyl)-25-(1-methylethyl)avermectin A1a (ii)
Other names avermectin B1
CAS RN [71751-41-2] (abamectin); [65195-55-3] (i); [65195-56-4] (ii)
Composition A mixture containing ³80% avermectin B1a (i) and £20% avermectin B1b (ii). Mol. wt. 873.1 (avermectin B1a); 859.1 (avermectin B1b)
M.f. C48H72O14 (avermectin B1a); C47H70O14 (avermectin B1b) Form Colourless to pale yellow crystals.
M.p. 161.8-169.4 癈 (decomp.)
V.p. <3.7 ´ 10-3 mPa (25 癈)
KOW logP = 4.4?.3 (pH 7.2, room temperature)
Henry 2.7 ´ 10-3 Pa m3 mol-1 (25 癈)
S.g./density 1.18 (22 癈)
Solubility In water 7-10 mg/l (20 篊). In toluene 350, acetone 100, isopropanol 70, chloroform 25, ethanol 20, methanol 19.5, n-butanol 10, cyclohexane 6 (all in g/l, 21 篊).
Specification for Abamectin 95% TC |
|
ITEMS |
STANDARDS |
Appearance |
White to beige,crystalline powder |
Content of a.i. |
≥95% |
B1a/B1b |
≥ 4.0 |
Loss on drying |
≤2.0% |
pH |
4.5~7.0 |
Acetone insolubles |
≤0.2% |
Specification for Abamectin 1.8% EC |
|
ITEMS |
STANDARDS |
Appearance |
Homogeneous light golden liquid |
Content of a.i. |
≥1.8% |
Water |
≤0.6% |
pH |
4.5~7.0 |
Emulsion stability (as 0.5% aqueous solution) |
Qualified |
Stability at 0℃ |
The volume of solid and/or liquid which separates shall not be more than 0.3 ml. |
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