Zinc phosphide

Zinc phosphide

Chembox new
Name = Zinc phosphide
ImageName = Zinc phosphide
OtherNames = trizinc diphosphide
Section1 = Chembox Identifiers
CASNo = 1314-84-7

Section2 = Chembox Properties
Formula = Zn3P2
MolarMass = 258.1 g/mol
Appearance = dark gray crystals
Density = 4.6 g/cm3, solid
Solubility = insoluble
MeltingPt = 420°C
BoilingPt = 1100°C

Section3 = Chembox Structure
CrystalStruct = tetragonal

Section7 = Chembox Hazards
EUClass =

Zinc phosphide (Zn3P2) is an inorganic chemical compound.

Metal phosphides have been used as rodenticides. A mixture of food and zinc phosphide is left where the rodents can eat it. The acid in the digestive system of the rodent reacts with the phosphide to generate the toxic phosphine gas. This method of vermin control has possible use in places where rodents immune to many of the common poisons have appeared. Other pesticides similar to zinc phosphide are aluminium phosphide and calcium phosphide.

Zinc phosphide is typically added to rodent baits in amount of around 0.75-2%. The baits have strong, pungent garlic-like odor characteristic for phosphine liberated by hydrolysis. The odor attracts rodents, but has a repulsive effect on other animals; birds, notably wild turkeys, are not sensitive to the smell. The baits have to contain sufficient amount of zinc phosphide in sufficiently attractive food in order to kill rodents in a single serving; a sublethal dose may cause aversion towards zinc-phosphide baits encountered by surviving rodents in the future.

Rodenticide-grade zinc phosphide usually comes as a black powder containing 75% of zinc phosphide and 25% of antimony potassium tartrate, an emetic to cause vomiting if the material is accidentally ingested by humans or domestic animals. However, it is still effective against rats, mice, guinea pigs and rabbits, all of which do not have a vomiting reflex. [http://www.ratbehavior.org/vomit.htm]

Conditions/substances to avoid contact of zinc phosphide with are: acids, water, carbon dioxide and strong oxidizing agents.


Zinc phosphide can be prepared by the reaction of zinc with phosphorus:

:3 Zn + 2 P → Zn3P2

Zinc phosphide will react with water to produce phosphine (PH3) and zinc hydroxide (Zn(OH)2):

:Zn3P2 + 6 H2O → 2 PH3 + 3 Zn(OH)2


External links

* [http://extoxnet.orst.edu/pips/zincphos.htm Zinc Phosphide Pesticide Information Profile - Extension Toxicology Network]
* [http://www.epa.gov/pesticides/factsheets/chemicals/rodenticides_fs.htm EPA Proposed Risk Mitigation Decision for Nine Rodenticides]
* [http://www.michigan.gov/dnr/0,1607,7-153-10370_12150_12220-26326--,00.html Zinc phosphide properties and use in Michigan]
* [http://milmed.pmk.ac.th/md0173%20PESTICIDES%20IN%20THE%20MILITARY.pdf MD0173 - Pesticides in the military]

Wikimedia Foundation. 2010.

Look at other dictionaries:

  • zinc phosphide — n a dark gray powdery compound Zn3P2 having an odor resembling that of garlic and used as a rodenticide * * * the phosphide salt of zinc, a rodenticide that is toxic to most mammals and causes vomiting, convulsions, and pulmonary edema with… …   Medical dictionary

  • zinc phosphide — cinko fosfidas statusas T sritis chemija formulė Zn₃P₂ atitikmenys: angl. zinc phosphide rus. цинка фофид ryšiai: sinonimas – tricinko difosfidas …   Chemijos terminų aiškinamasis žodynas

  • zinc phosphide — noun : a dark gray powdery compound Zn3P2 having an odor resembling that of garlic and used as a rodenticide * * * Chem. a dark gray, gritty, water insoluble, poisonous powder, Zn3P2, used chiefly as a rodenticide. * * * zinc phosphide, an… …   Useful english dictionary

  • zinc phosphide — Chem. a dark gray, gritty, water insoluble, poisonous powder, Zn3P2, used chiefly as a rodenticide. * * * …   Universalium

  • Zinc — This article is about the metallic element. For other uses, see Zinc (disambiguation). copper ← zinc → gallium ↑ Zn ↓ Cd …   Wikipedia

  • Zinc — Cobre ← Zinc → Galio   …   Wikipedia Español

  • Zinc — A mineral essential to the body, zinc is a constituent of many enzymes that permit chemical reactions to proceed at normal rates. It is involved in the manufacture of protein (protein synthesis) and in cell division. Zinc is also a constituent of …   Medical dictionary

  • Aluminium phosphide — Chembox new Name = Aluminium phosphide ImageFile = Sphalerite unit cell depth fade 3D balls.png ImageSize = 200px ImageName = Aluminium phosphide OtherNames = Aluminium(III) phosphide Aluminium monophosphide Phostoxin Fumitoxin Section1 = Chembox …   Wikipedia

  • Sodium phosphide — Other names sodium phosphide, common trisodiophosphine …   Wikipedia

  • Calcium phosphide — Chembox new ImageFile = ImageSize = IUPACName = OtherNames = Photophor, CP, Polythanol Section1 = Chembox Identifiers CASNo = 1305 99 3 PubChem = SMILES = Section2 = Chembox Properties Formula = Ca3P2 MolarMass = 182.18 g/mol Appearance = red… …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”