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ALUMINIUM PHOSPHIDE ZINC PHOSPHIDE PHOSPHINE PHOSPHORIC ACID
 
MATERIAL SAFETY DATA SHEET - ZINC PHOSPHIDE
 
 SL NO.  PARTICULARS  PRODUCT DETAILS
 1.0  IDENTITY OF MATERIAL  
 1.1  Product Name  Zinc Phosphide
 1.2  Trade Name  SYNPHOS
 1.3  Chemical Designation  Metal phosphide
 1.4  Synonyms  Zinc Phosphide, Tri zinc diphosphide
 1.5  Formula  Zn3P2
 1.6  Label Class  Dangerous & Toxic
 1.7  Category  Rodenticide
 1.8  CAS Number  1314-84-7
 1.9  UN Number  1714
 1.10  Regulated Identification  Synphos Zinc Phosphide
 1.11  Shipping Name  Zinc Phosphide
 1.12  Codes/Label  4.3 Packing Group - I
 1.13  HAZCHEM Code  NA
 1.14  Hazardous Waste Identification No.  NA
 1.15  Hazardous Ingredients with CAS No.  Phosphine - 7803-51-2
 
 2.0  PHYSICAL & CHEMICAL PROPERTIES  
 2.1  Physical State (Gas/liquid/solid)  Solid, powder form
 2.2  Appearance  Greyish-black free flowing powder
 2.3  Odour.  Garlic-like odour
 2.4  Others (Corrosivity, etc..)  Not corrosive by itself, however phosphine gas released on hydrolysis is highly corrosive  especially to noble metals..
 2.5  Boiling Point  Sublimes at 1100 degC
 2.6  Melting Point  > 420 degC
 2.7  Vapour Density (air=1)  N/A
 2.8  Specific Gravity (water=1)  4 gm/ml
 2.9  Vapour Pressure  0 mm Hg at 20 degC
 2.10  Evaporation rate  N/A
 2.11  Solubility in water
 In Water - Insoluble
 In Alcohol - Insoluble
 In Organic Solvents - Soluble in Carbondisulphide and Benzene
 Insoluble in Ethanol
 2.12  pH  Almost Neutral. 10% suspension in water pH 7.1-7.2
 
 3.0  FIRE AND EXPLOSIVE HAZARDS DATA  
 3.1  Explosion/Flammability  Zinc phosphide is not flammable by itself. It reacts with acids to produce phosphine gas, which is  flammable at 38 degC. font>
 3.2  Flash Point LEL % UEL %  Phosphine - 1.8%
 3.3  Auto ignition  N/A
 3.4  TDG Flammability (Classification)  Not flammable.
 
 4.0  REACTIVE HAZARDS:  
 4.1  Stability  Stable when stored in a cool, dry & well ventilated place. Reacts violently with acids and slowly  with water to release toxic phosphine gas.
 4.2  Impact (Haz. Combustion products)  Reacts with acids to produce toxic phosphine gas, which ignites at 38 degC. When heated to  decomposition toxic fumes of Pox and ZnO are produced.
 4.3  Static Discharge (Haz. Combustion products)  N/A
 4.4  Reactivity (Conditions to avoid)  Store away from water, acids, oxidizing agents (such as perchlorates, peroxides,  permanganates, chlorates, nitrates, chlorine, bromine & fluorine), bromine azide and hydrogen.  Do not handle with sharp tools.Do not expose to heat, flame.
 4.5  Hazardous Polymerization  Nil
 4.6  Incompatibility  Store away from water, acids, oxidizing agents (such as perchlorates, peroxides,  permanganates, chlorates, nitrates, chlorine, bromine & fluorine), bromine azide and hydrogen.
 
 5.0  HEALTH HAZARD DATA  
 5.1  Routes of entry  Inhalation, ingestion & dermal.
 5.2  Effects of exposure/symptoms  Exposure to zinc phosphide leads to nausea, vomiting, diarrhea, cough, headache and dizziness.  In severe cases this progresses to cardiovascular collapse, pulmonary edema, cyanosis and  respiratory failure. Pericarditis, renal failure and hepatic damage including jaundice may develop  later.
 5.3  LD50 (in rat) oral  LD50 - Rats : 40 - 50 mg/kg
   LD50 (in rat) dermal  LD50 - Rats : > 2000 mg/kg
 5.4  LC50 (in rat) mg/l  Phosphine - 220 mg.h/m3
 5.5  Permissible exposure Limit (PEL)  Not Available
 5.6  Threshold limit value (TLV or ACGIH)  0.3 ppm/8 hours/5 days a week - Phosphine
 5.7  Emergency treatment
 A. INHALATION OF PHOSPHINE:
 (i) Remove patient from exposure, keep at rest. Rescuers should follow full safety  procedures.
 (ii) If the patient is unconscious, place in semi-prone recovery position or otherwise maintain  the airway.
 (iii) If patient is conscious but has difficulty in breathing, treat in a seated position and give  oxygen if available.
 (iv) Allow patient to recline with the legs slightly elevated.
 (v) If breathing stops, immediately ventilate the patient artificially (mouth to mouth/nose or  mechanically with oxygen available).
 (vi) If the heart stops, begin cardiopulmonary resuscitation-CPR.
 B. INGESTION OF ZINC PHOSPHIDE:
 (i) Do not give milk, fats, or saline emetics by mouth.
 (ii) Give oxygen if there is respiratory distress.
 (iii) If first aiders are medically authorized to do so, and the patient is conscious, induce  vomiting.
 (iv) After 20 min (or after vomiting), administer activated charcoal (50gm in water by mouth) or  give carbocysteine, if available.
 (v) Obtain medical attention as soon as possible; preferably send immediately to hospital.
 
 6.0  HAZARD SPECIFICATION  
 6.1  NEPA Hazard Signal  Dangerous when wet & Toxic
 6.2  Health  1
 6.3  Flammability  3
 6.4  Stability  1
 6.5  Special  ----
 6.6  KNOWN HAZARDS  
   Combustible liquid:  No
   Flammable material:  Yes
   Pyrophonic Material:  No
   Unstable Material:  No
   Explosive Material:  Yes
   Water reactivity:  Yes
   Oxidizer:  No
   Organic Peroxide:  No
   Compressed Gas:  No
   Irritant:  Yes
   Sensitizer:  Yes
   Carcinogen:  No
   Mutagen:  No
   Others (Specify):  ----
 
 7.0  SAFE USAGE DATA  
 7.1  Ventilation: General/Mechanical Local Exhaust  Provide adequate ventilation. As far as possible handle in enclosed area.
 7.2  Protective Equipment  
 7.2.1  Eyes  As found suitable like goggles, masks.
 7.2.2  Respiratory  Supply of fresh air through tube masks.
 7.2.3  Gloves  Synthetic rubber gloves.
 7.2.4  Clothing  Lightweight impervious overalls like cotton apron.
 7.2.5  Others  Use adequate headgear.
 7.3  Precautions  
 7.3.1  Handling & Storage
 Storage to be done in a cool, dry and well-ventilated place. Keep under lock & key, away from  children and pets.
 Do not allow contact with water, acids, other oxidizing agents or any other liquids.
 Keep away from heat, flame & other flammable chemicals.
 Wash hands thoroughly with soap after handling.
 7.3.2  Others
 Do not open containers with sharp tools.
 Use proper protective equipment while handling.
 
 8.0  EMERGENCY RESPONSE DATA  
 8.1  Fire extinguishing media  In case of fire, suffocate flames with sand, use CO2 extinguishers or use dry chemical  extinguishers. DO NOT USE WATER.
 8.2  Special Procedures  Engulf fire with sand or dry powder extinguisher.
 8.3  Unusual Hazards  Reacts with moisture in air to release toxic phosphine gas.
 8.4  Exposure (Inhalation, skin, eye contact, ingestion)
 Inhalation: Remove from contaminated area into fresh air. Give oxygen if conscious, CPR if  patient has suffered cardiac arrest.
 Skin: Remove contamination clothing and wash affected area thoroughly with water.
 Eye: Wash eyes thoroughly in eye wash fountain.
 Ingestion: Induce vomiting if conscious, with 1:5000 potassium permanganate. Give 50 gms of  activate carbon in water.
 8.5  Spills
 Do not wash the material in sewer. Use adequate masks & gloves.
 The material can be collected and left in open air, (far from inhabitation) keeping it moist until it  has hydrolysed fully - this process is called `Dry Deactivation'.
 `Wet Deactivation': Deactivating solution is prepared in a drum or a suitable container and the  material collected is added slowly. The deactivation solution can be 2 % or 4 cups of low  sudsing detergent in 30 gallons of water.
 Partly spent material can also be deactivated in this process. Utmost care to be taken while  adding the material. This process should be undertaken in open air, adhering to all the  precautionary measures.
 The deactivated material, dust-water can be disposed off at an approved site.
 The area of spillage should be thoroughly washed with huge quantity of water and should be  aerated. Entry into the area should be allowed only after checking the gas concentration.
 Phosphine gas, if liberated can be slowly let off in the open air. If huge quantities are let off, then  it should be ignited by a suitable burner.
 8.5.1 Steps to be taken  Refer 8.5 given above
 8.5.2  Waste disposal method  Refer 8.5 given above. The used containers should not be kept for re-use. Packaging material  should be destroyed by burying underground or incinerated, at approved sites.
 9.0  ADDITIONAL INFORMATION  The use of zinc phosphide as a Rodenticide in public health was reviewed by WHO in 1972. It  was concluded that it was a generally effective compound and, while highly toxic to domestic  fowl, its safety record was good. The use of zinc phosphide was endorsed (WHO 1973)
 10.0  SOURCES USED
 1) Phosphine & Metal Phosphides - WHO Environmental Criteria 73.
 2) Sax's Dangerous Properties of Industrial Materials.
 3) New Jersey Department of Health & senior services - Hazardous substances fact sheet.
 4) Publication by Agriculture State Department, Michigan.
 
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