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 °C)  KOW logP = 0.12  Henry 3.5 Pa m3 mol-1 (calc.)  S.g./density 1.27 (20 °C)  Solubility In water 222 mg/l (20 °C). In toluene 530, methanol 1730 (both in mg/l, 20 °C).  Stability Depolymerises and sublimes above 112 °C.  F.p. 50-55 °C (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%