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Date of Issue : Aug 1999 1. IDENTIFICATION
General Product Name : MOLYBDENUM TRIOXIDE Other Names : MOLYBDENUM ANHYDRIDE ; MOLYBDIC OXIDE MOLYBDIC ACID HYDRIDE UN No. : N/A Dangerous Goods Class : None Allocated Subsidiary Risk : None Allocated Hazchem Code : N/A Pack Group : 0 EPG : N/A Poisons Schedule : N/A Uses : Source of molybdenum compounds, agriculture, analytical chemistry, manufcature of metallic molybdenum, introduction of molybdenum in alloys, corrosive inhibitor, cermaic glazes, enamels, pigments, catalyst.
1.1 Physical Description / Properties
Appearance : White powder at room temperature, yellow at elevated temperatures. Formula : MoO3 Boiling Point : 1150 deg C Melting Point : 795 deg C Vapour Pressure : N/A Specific Gravity : 4.69 (water = 1) Flash Point : N/A pH : N/A () Solubility in water : N/A g/l (25 deg C) Flammability Limits (as percentage volume in air) Lower Explosion Limit : N/A Upper Explosion Limit : N/A 1.2 Other Properties
Sublimes starting at 700 deg C. Formula weight: 143.94. Sparingly soluble in water, very soluble in excess alkali with formation of molybdates, soluble in concentrated mixture of nitric acid and hydrochloric acid or nitric acid and sulphuric acids. 1.3 Ingredients
2. HEALTH HAZARD INFORMATION
2.1 Health Effects - Acute Swallowed
No information available. Eye
Irritant. Skin
Irritant. Inhaled
Irritant of upper respiratory tract. 2.2 Health Effects - Chronic
Target organs: respiratory system, lungs, and in animals: kidneys, blood. Primary routes of entry: inhalation, skin contact and eye contact.
2.3 First Aid
Swallowed
If conscious, immediately induce vomiting by giving two glasses of water and sticking a finger down the throat. Get immediate medical attention. Do not give anything by mouth to an unconscious or convulsing person.
Eye
Immediately flush eyes with lots of running water for 15 minutes. Lift the upper and lower eyelids occasionally. Get immediate medical attention.
Skin
Immediately wash skin with lots of soap and water. Remove contaiminated clothing and shoes; wash before reuse. Get medical attention if irritation persists after washing.
Inhaled
Remove to fresh air. Give artificial respiration if not breathing. Get immediate medical attention.
First Aid Facilities
Ensure an eye bath and safety shower are available and ready for use.
2.5 Advice to Doctor
Treat symptomatically based on individual reactions of patient and judgement of doctor.
2.6 Toxicity Data
Oral (rat) LD50: 125 mg/kg. Inhalation (man) TCLo: 6 mg/m3/4yr. Inhalation (rat) LC75: 431 mg/m3/1hr.
3. PRECAUTIONS FOR USE
3.1 Exposure Standards
Permissable exposure limit (PEL): 2 mg/m3.
3.2 Engineering Controls
Ensure adequate ventilation to keep the exposure limit below recommended levels.
3.3 Personal Protection
Use chemical goggles and full face shield. Wear longsleeved shirt, trousers, safety shoes, rubber gloves, and rubber apron.
3.4 Flammability
Not flammable. SAFE HANDLING INFORMATION
4.1 Storage / Transport
Store in a well ventilated place, keep container tightly closed to prevent ammonium and acid contact, and to prevent spilling. Do not use pressure to empty container. Wash thoroughly after handling.
4.2 Packaging / Labelling UN No. N/A Class None Allocated Sub Risk None Allocated Hazchem Code N/A Pack Group 0 EPG No. N/A Shipping Name MOLYBDENUM TRIOXIDE Hazard HARMFUL
Risk Phrases R36/37 Irritating to eyes and respiratory system. R48/20/22 Harmful : danger of serious damage to health by prolonged exposure through inhalation and if swallowed.
Safety Phrases S2 Keep out of the reach of children. S22 Do not breathe dust. S25 Avoid contact with eyes.
4.3 Spills and Disposal
Spills
Clean up personnel should wear full protective clothing including respiratory protection is airbourne concentrations likely to excedd exposure standard.
Carefully sweep up spilled material and remove.
Disposal
Dispose of in accordance with all local, state and federal regulations.
4.4 FIRE AND EXPLOSION HAZARD Fire / Explosion
Use water spray to cool nearby containers and structures exposeed to fire. Extinguish all nearby sources of ignition.
Extinguishing Media
Firefighters should wear full protective clothing including self contained breathing apparatus. Use water spray, CO2, sand, etc. as extinguishing media. 5 OTHER INFORMATION
Other Information
No informatin available.
5.1 Contact Points
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The information above is believed to be accurate and represents the best information currently available to us. However, we make no warranty of merchantability or any other warranty, express or implied, with respect to such information, and we assume no liability resulting from its use.
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