Magnesium Phosphide 磷化镁

磷化镁

CAS编码： 12057-74-8
IUPAC名称： magnesium phosphide
英文通用名称： Magnesium phosphide
中文通用名称： 磷化镁
英文化学名称： magnesium phosphide

理 化 性 质
分子式： Mg3P2
分子量： 134.9
性状描述： 原药外观为灰绿色固体，熔点>750℃。制剂外观为桔红色至灰白色固体。Composition:Form:Yellow-green crystals. M.p.: >750 ℃ B.p.: V.p.: Henry: S.g./density: 2.055 Solubility: Stability: Stable when dry, but reacts with atmospheric moisture, and violently with acids, producing phosphine; used to generate this fumigant, reacting more rapidly than aluminium phosphide. F.p.:

毒 理 学 性 质
LD50/LC50
急性经口：11.2mg/kg；急性经皮：1520mg/kg。Oral: Acute oral LD50 for rats 11.2 mg/kg.Skin and eye Acute percutaneous LD50: Inhalation: Birds: Fish: Bees: Daphnia: Algae: Worms: Other aquatic spp.:
其他毒理学性质： 高毒。Toxicity class EPA(formulation):　

类别： 杀虫剂，杀鼠剂，仓储熏蒸剂。

作用特点： 该药遇水生成高毒的磷化氢气体，用其熏蒸可有效防除仓储烟草中的烟草甲虫。

Magnesium Phosphide
Insecticide, rodenticide
IRAC 8B; fumigant

NOMENCLATURE

magnesium phosphide
IUPAC name magnesium phosphide
Chemical Abstracts name magnesium phosphide
CAS RN [12057-74-8] EEC no. 235-023-7

PHYSICAL CHEMISTRY

magnesium phosphide
Mol. wt. 134.9 M.f. Mg3P2 Form Yellow-green crystals. M.p. >750 °C S.g./density 2.055 Stability Stable when dry, but reacts with atmospheric moisture, and violently with acids, producing phosphine; used to generate this fumigant, reacting more rapidly than aluminium phosphide.

COMMERCIALISATION
magnesium phosphide
History Introduced by Degesch AG to generate phosphine and so fumigate stored foodstuffs. Patents DE 923999 to Edmund Manufacturers Detia Freyberg; United Phosphorus

APPLICATIONS
magnesium phosphide
Mode of action Insecticide and rodenticide which is a respiratory, metabolic, and nerve poison. Liberates phosphine, which is the toxicant. Uses As for aluminium phosphide. Also used for control of moles, voles, rats, hamsters, and rabbits by fumigation of burrows. Phytotoxicity Living plants, fresh vegetables and fruits, with few exceptions, should not be fumigated. Formulation types GE; Fumigant. Selected products: 'Magnaphos' (United Phosphorus); 'Magtoxin' (Detia Degesch)

OTHER PRODUCTS

magnesium phosphide
'Degesch Plates' (Detia Degesch); 'Fumi-Cel' (Degesch America); 'Fumi-Strip' (Degesch America) Discontinued products: 'Detiaphos' * (Detia Degesch)

ANALYSIS
magnesium phosphide
Product analysis by determining the phosphine liberated on treatment with acid, by glc (T. Dumas, J. Assoc. Off. Anal. Chem., 1978, 61, 51) or phosphate produced after reaction with bromine water (R. B. Bruce et al., J. Agric. Food Chem., 1962, 10, 18).

MAMMALIAN TOXICOLOGY
magnesium phosphide
Oral Acute oral LD50 for rats 11.2 mg/kg. Toxicity class WHO (a.i.) FM EC classification F; R15/29| T+; R28| N; R50

ENVIRONMENTAL FATE
EHC 73 (WHO, 1988; a review of phosphine and metal phosphides). Animals In mammals, phosphine is probably metabolised to non-toxic phosphates. Plants In stored products, phosphine undergoes oxidation to phosphoric acid.