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Cypermethrin
Technical
Alphacypermethrin Technical
Permethrin Technical
Fenvalerate Technical |
| Cypermethrin Technical |
| Chemical family |
Synthetic Pyrethroid |
| Chemical name |
(±) - a Cyano – 3 – Phenoxy Benzyl (±) Cis, Trans 3 – (2,
2 – dichlorovinyl) – 2, 2 – Dimethyl / Cyclo Propane Carboxylate |
| Empirical formula |
C22 H19 NO3 Cl2 |
| Structural formula |
|
| Physical properties |
| Molecular weight |
416.3 |
| Appearance |
Yellow to brown viscous liquid or semi solid mass free from
extraneous matter |
| Odour |
Characteristic odour |
| Specific gravity |
1.23 at 250 C |
| Vapour pressure |
1.4 x 10-9 mm Hg at 200 C |
| Solubility |
Soluble in wide range of organic solvent. Practically soluble
in water |
| Stability |
Cypermethrin is stable in acidic medium than in an alkaline
one. High thermal stability (no degradation after 3 months at
500 C) |
| Specifications |
| Cypermethrin content |
Min. 92-93% |
| Acidity (As Sulphuric acid) |
Max. 0.3% |
| Moisture content by KF |
Max. 0.2% |
| Acetone insoluble matter |
Max. 0.5% |
| Meta Phenoxy Benzyl Alcohol |
Max. 2% |
| Grades |
Cypermethrin technical with different Cis-Trans ratio i.e.
40:60 & 50:50 & 80:20 are available |
| Packing |
50 kgs & 200 kgs. Epoxy-coated MS Drums |
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| Alphacypermethrin
Technical |
| Chemical family |
Synthetic Pyrethroid |
| Chemical name |
(1 a (S), 3 a - (±) – Cyano – (3 – Phenoxyphenyl) Methyl
3 – (2, 2 – Dichloroethynyl) – 2, 2 Dimethylcyclopropanecarboxylate |
| Empirical formula |
C22 H19 NO3 Cl2 |
| Structural formula |
|
| Physical properties |
| Molecular weight |
416.3 |
| Appearance |
White to pale yellow powder |
| Odour |
Weak aromatic odour |
| Specific gravity |
1.28 at 220 C |
| Vapour pressure |
23 m Pa (200 C) |
| Solubility |
In water 0.01 mg./lit. at 250 C. in acetone 620, dichloromethane
550, cyclohexanone 515, ethyl acetate 440, chlorobenzene 420,
acetophenone 390, o-xylene 350, hexane 7 (all in g/lit. at 250
C) |
| Stability |
Alphacypermethrin is very stable in neutral and acidic media.
Hydrolysed in strongly alkaline media. Thermally stable upto
2200 C. the field data indicate that in practice
it is stable to air and light. |
| Specifications |
| Alphacypermethrin content |
Min. 95-97% |
| (IR CIS) R + (IS CIS) S |
Max. 1.5% |
| TRANS ISOMER |
Max. 1.0% |
| Moisture content by KF |
Max. 0.25% |
| Alkalinity (As NaOH) |
Max. 0.25% |
| Packing |
50 kgs Epoxy-coated MS Drums |
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| Permethrin Technical |
| Chemical family |
Synthetic Pyrethroid |
| Chemical name |
3 Phenoxy Benzyl (1 RS, 3 RS, 1RS, 3 SR) – 3 – (2, 2 – Dichlorovinyl)
– 2, 2 – Dimethyl Cyclopropanecarboxylate |
| Empirical formula |
C21 H20 Cl2 O3
|
| Structural formula |
|
| Physical properties |
| Molecular weight |
391.3 |
| Appearance |
Yellow viscous liquid. Partly crystalline at room temperature.
Free from extraneous matter. |
| Odour |
Sweet odour |
| Specific gravity |
1.214 at 250 C |
| Vapour pressure |
1.3 m Pa |
| Melting point |
34 – 390 C |
| Solubility |
Water – none. Soluble or miscible with most organic solvents,
acetone 450 g/lit., hexane (>1 kg/kg), Methanol (259 g/kg),
xylene (>1 kg/kg) |
| Stability |
Permethrin is table to heat and light. It is more resistant
in acidic media than alkaline with optimum stability at pH 4. |
| Specifications |
| Permethrin content |
Min. 92 – 93% |
| Acidity (As sulphuric acid) |
Max. 0.3% |
| Moisture content by KF |
Max. 0.2% |
| Acetone insoluble matter |
Max. 0.5% |
| Meta Phenoxy Benzyl Alcohol |
Max. 2% |
| Grades |
Permethrin technical with different Cis – Trans ratio i.e.
40:60 & 25:75 are available |
| Packing |
50 kgs & 200 kgs Epoxy-coated MS Drums |
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| Fenvalerate Technical |
| Molecular form |
C25 H22 Cl NO3 |
| Molecular weight |
410.92 |
| Density |
1.172 g/ml at 230 C |
| Flash point |
Not below 440 C |
| Appearance |
Viscous Yellowish liquid |
| Assay : (By GC) |
92% Min. |
| Moisture |
0.50% Max. |
| Acidity : (As Sulphuric Acid) |
± % Max. |
| Insolubles |
0.50% Max. |
| Packing |
50 kg and 200 kg mild steel drums |
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