metaldehyde
96%tech,
Molluscicide
NOMENCLATURE
Common name metaldehyde (BSI, E-ISO, F-ISO, JMAF, accepted in lieu of a common name)
IUPAC name r-2,c-4,c-6,c-8-tetramethyl-1,3,5,7-tetroxocane; 2,4,6,8-tetramethyl-1,3,5,7-tetraoxacyclo-octane
Chemical Abstracts name 2,4,6,8-tetramethyl-1,3,5,7-tetraoxacyclooctane; acetaldehyde tetramer (but see Composition)
Other names acetaldehyde tetramer CAS RN [108-62-3] for tetramer; ([9002-91-9] for homopolymer) EEC no. 203-600-2
PHYSICAL CHEMISTRY
Composition Metaldehyde is a tetramer of acetaldehyde; it is sometimes, incorrectly, referred to as a homopolymer of acetaldehyde. Mol. wt. 176.2 (tetramer) M.f. C8H16O4 (tetramer); (C2H4O)x (homopolymer) Form Crystalline powder. M.p. 246 ºC (sealed tube) B.p. Sublimes at 112-115 ºC (atmospheric pressure), with partial depolymerisation V.p. 6.6 ´ 103 mPa (25 ¡ãC) KOW logP = 0.12 Henry 3.5 Pa m3 mol-1 (calc.) S.g./density 1.27 (20 ¡ãC) Solubility In water 222 mg/l (20 ¡ãC). In toluene 530, methanol 1730 (both in mg/l, 20 ¡ãC). Stability Depolymerises and sublimes above 112 ¡ãC. F.p. 50-55 ¡ãC (Abel-Pensky closed cup)
APPLICATIONS
Mode of action Molluscicide with contact and stomach action. Metaldehyde-poisoned slugs secrete large quantities of slime, desiccate and die. Their mucus cells are irreversibly destroyed. Uses Control of slugs and snails in agriculture and horticulture. Phytotoxicity Non-phytotoxic when used as recommended. Formulation types GB; RB; Pellets.
product name: |
metaldeyde 96% tech |
appearance: |
white acetate crystal powder |
a.i. content: |
96.02% |
paraldehyde: |
0.1% |
acetaldehyde: |
0.05% |