Phosphorus pentoxide
1, Product Name: Phosphorus pentoxide
2, Alias: Phosphoric anhydride
3, Molecular Formula: P2O5
4, Molecular Weight: 141.94
5, IMDG Code: GB8.1 Class 81063. Base iron:
grade-A inorganic acid corrosive goods, 91034, UN NO.: 1807.
IMDG CODE Page 8198, Class 8.
6, Use: As raw material for phosphorus oxychloride
and metaphosphoric acid; for acrylic ester, surfactants,
dehydrating agents, driers, anti-static agent,
refining of drugs and sugars, analytical reagent.
7, Properties: It is usually white, highly deliquescent
crystalline powder. Density: 0.9g/cm3, sublime at 300°C.
M.P.: 580-585°C. Vapor tension: 133.3Pa (384°C).
It will become vitreous body when heated at high temperature
under pressurization. It can easily absorb moisture in the
air; will release white fume when dissolving in the water.
8, Risk Characteristics: Non-combustible. Will react
violently with exposure to water, wood, cotton or grass and
can burn. Can generate large amount of smog and release heat
in water; slightly corrosive to most metals. Locally highly
irritating to eyes, skin, mucous membrane and respiratory
system.
9, Emergency Measures & Fire Fighting: Firefighters
must wear full-bodyarmour; fight fire with sand and dry powder
instead of water. First aid: Sufferers inhaled steam must
be evacuated from polluting area, put down to have rest and
keep warm. If eyes are polluted, wash eyes with water for
15 min. above, and then see the doctor. For skin contact,
wash skin with water first, and then smear with magnesia-glycerine
ointment. If burnt, see the doctor. For oral taking, wash
the mouth, drink water and milk of magnesia, and then see
the doctor.
10, Storage: Corrosive. Packing: Class (Ⅱ).
Stored in cool, dry and draughty warehouse. No mixing with
inflammables and alkali. Handle with care. Containers must
be sealed tightly. Protect from rain. Accidental release
measures: Wear masks and gloves, mix sodium bicarbonate or
mixture of low alkali and lime hydrate into mud, and then
put it gradually into water, neutralize and dilute and it
into waste water which is put into the waste-water system.
11, Shelf Life: 30 days from May to September; 60
days from October to April; 6 months in tightly sealed drum.
12, Quality Index:
Item |
Value |
Tech grade (C.P.) |
A.R. |
Special grade |
Assay(P2O5)% |
≥98% |
≥99% |
≥99.5% |
Active R value |
1.2 |
1.7 |
2.0 |
Reducing substances(P2O3)% |
≤0.01 |
≤0.008 |
≤0.005 |
Clarity test |
Qualified |
Qualified |
Qualified |
Insol. in water % |
≤0.02 |
≤0.01 |
≤0.01 |
Total Nitrogen (N)% |
≤0.01 |
≤0.002 |
≤0.001 |
Heavy meta (Pb)% |
≤0.01 |
≤0.002 |
≤0.001 |
iron (Fe)% |
≤0.01 |
≤0.002 |
≤0.001 |
Arsenic (As)% |
≤0.01 |
≤0.007 |
≤0.005 |
13, Packing: In woven bag lined with
plastic. 20Kg, 25Kg/bag;
In
plastic drum; 50KG/drum. |
