Phosphorus pentasulfide

  • Phosphorus persulfide
  • Phosphorus sulfide
  • Sulfur phosphide
  • Diphosphorus pentasulfide
Formula
P4S10
Structure
Description
Gray-yellow crystals. Odorless or rotten egg odor.
Uses
Manufacture of safety matches, ignition compound, in manufacture of lube oil additives and pesticides and for introducing sulfur into organic compound.

Registry Numbers and Inventories.
CAS
1314-80-3
EC (EINECS/ELINCS)
215-242-4
EC Index Number
015-104-00-1
EC Class
Highly flammable; Contact with water liberates toxic gas; Harmful; Dangerous for the Environment
R 11 20/22 29 50
RTECS
TH4375000
RTECS class
Primary Irritant
UN (DOT)
1340
Merck
12,7511
Beilstein/Gmelin
4404 (G)
RCRA
U189
Swiss Giftliste 1
G-2744
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
P2S5
Formula mass
222.27
Melting point, °C
284 - 287
Boiling point, °C
513
Vapor pressure, mmHg
1 (300 C)
Odor Threshold Odor threshold 0.0047 ppm
Density
1.731 g/cm3 (323 C)
Solubility in water
Reacts
Heat of vaporization
95.0 kJ/mol
Heat of combustion
-5623 kJ/mol

Hazards and Protection.
Storage
Keep away from heat, sparks, and flame. Keep away from sources of ignition. Store in a cool, dry, well-ventilated area away from incompatible substances. Keep away from water. Flammables-area. Keep containers tightly closed.
Handling
Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Do not allow water to get into the container because of violent reaction. Minimize dust generation and accumulation. Ground and bond containers when transferring material. Use spark-proof tools and explosion proof equipment. Avoid contact with eyes, skin, and clothing. Empty containers retain product residue, (liquid and/or vapor), and can be dangerous. Keep container tightly closed. Avoid contact with heat, sparks and flame. Avoid ingestion and inhalation. Do not allow contact with water. Do not pressurize, cut, weld, braze, solder, drill, grind, or expose empty containers to heat, sparks or open flames. Keep from contact with moist air and steam.
Protection
Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear appropriate protective gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to prevent skin exposure.
Respirators
Follow the OSHA respirator regulations found in 29CFR 1910.134 or European Standard EN 149. Always use a NIOSH or European Standard EN 149 approved respirator when necessary.
Small spills/leaks
Clean up spills immediately, using the appropriate protective equipment. Avoid generating dusty conditions. Cover with sand, dry lime or soda ash and place in a closed container for disposal. Remove all sources of ignition. Use a spark-proof tool. Provide ventilation. Do not expose spill to water. A vapor suppressing foam may be used to reduce vapors.
Stability
Stable under normal temperatures and pressures. Combines vigorously or explosively with water.
Incompatibilities
Acids, alcohols, water, air, steam.
Decomposition
Phosphine, carbon monoxide, oxides of phosphorus, irritating and toxic fumes and gases, carbon dioxide, hydrogen sulfide.

Fire.
Flash Point,°C
137
Autoignition, °C
142
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. Will burn if involved in a fire. Water Reactive. Material will react with water and may release a flammable and/or toxic gas. Containers may explode in the heat of a fire. Flammable solid. May ignite or explode on contact with steam or moist air. Dangerous fire hazard in the form of dust when exposed to heat or flame. Extinguishing media: Use dry sand or earth to smother fire. For small fires, use dry chemical, carbon dioxide, water spray or alcohol-resistant foam. For large fires, use water spray, fog, or alcohol-resistant foam. Use water spray to cool fire-exposed containers. Water may be ineffective. Do NOT use straight streams of water.
Fire potential
Flammable, Slightly flammable. Combustion requires preheating. Moderate hazard.
Hazards
Produce flammable and toxic gases on contact with water. May ignite on contact with water or moist air. May be ignited by heat, sparks or flames. May re-ignite after fire is extinguished.
Combustion products
Products of combustion include sulfur dioxide and phosphorus pentoxide, which are irritating, toxic and corrosive.
Health
2
 
Flammability
1
 
 
Reactivity
2
 
 
Special
W

Health.
Exposure limit(s)
NIOSH REL: TWA 1 mg/m3 ST 3 mg/m3 OSHA PEL: TWA 1 mg/m3 IDLH 250 mg/m3
Poison_Class
1
Exposure effects
Prolonged exposure to hydrogen sulfide may result in pulmonary edema.
   Ingestion
Harmful if swallowed. May cause irritation of the digestive tract.
   Inhalation
May cause respiratory tract irritation. Vapors may cause dizziness or suffocation.
   Skin
Causes severe skin irritation.
   Eyes
Causes severe eye irritation.

First aid
 
   Ingestion
If victim is conscious and alert, give 2-4 cupfuls of milk or water. Never give anything by mouth to an unconscious person. Get medical aid immediately.
   Inhalation
Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid.
   Skin
Get medical aid. Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse.
   Eyes
Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately.

Transport.
UN number
1340
Response guide
Hazard class
4.3
PRTC
T
Packing Group
II
 
USCG CHRIS Code
PPP
 
HS Code
2813 90 10
 
Std. Transport #
4916320