Copper Sulfide

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Product Name:     Copper Sulfide (Copper II Sulfide)

Formula:              CuS

CAS Number:        1317-40-4




Hazardous Components:  Copper Sulfide

Percent (%):                     0-100 

OSHA/PEL:                        1 mg(Cu)/m3 

ACGIH/TLV:                      1 mg(Cu)/m3 




Boiling Point:                   220 oC (decomposes)

Melting Point:                  103 oC (transition)

Specific Gravity:              4.6 g/cc

Solubility in H2O:             Insoluble                                                              

Appearance and Odor:    Black powder, no odor




Flash Point:  N/A

Autoignition Temperature:  No Data

Extinguishing Media:  DO NOT USE WATER.  Use dry powder extinguishing agents, dry sand, dry ground dolomite, carbon dioxide.

Special Fire Fighting:  Firefighters must wear full face, self-contained breathing apparatus and full protective clothing to prevent contact with skin and eyes.

Unusual Fire & Explosion:  Fire hazard when exposed to flame or by spontaneous chemical reaction.  Reacts with water, steam or acids to produce toxic and flammable vapors of hydrogen sulfide.




Effects of Exposure:

To the best of our knowledge the chemical, physical and toxicological properties of copper sulfide have not been thoroughly investigated and recorded.

Copper compounds may be irritating to the skin, eyes, and respiratory tract. They may cause metal fume fever, hemolysis of the red blood cells, and injury to the liver, lungs, kidneys and pancreas. Ingestion may also cause vomiting, gastric pain, dizziness, anemia, cramps, convulsions, shock, coma, and death.

Sulfides show variable toxicity. The alkaline sulfides are similar in action to alkalies. They cause irritation of the skin and are corrosive by ingestion. The heavy metal sulfides are generally insoluble and show little toxic action except through the liberation of hydrogen sulfide. Hydrogen sulfide, if generated, is toxic, a severe irritant, and flammable. Effects include conjunctivitis, headache, nausea, dizziness, coughing, pulmonary edema, and possibly death.

Acute Effects:

Inhalation:  May cause a metallic taste in the mouth, congestion of the nasal mucous membranes, irritation to the respiratory tract.

Ingestion:  Poison by intraperitoneal route. May cause acute copper toxicity.

Skin:  May cause irritation.

Eye:  May cause irritation.

Chronic Effects:

Inhalation:  May cause ulceration and perforation of the nasal septum and pharyngeal congestion.

Ingestion:  May cause irritation to the gastrointestinal tract and chronic copper toxicity. May cause damage to the nervous system, kidneys, and enlarge the liver.

Skin:  May cause dermatitis.

Eye:  No chronic health effects recorded.

Target Organs:  May affect the respiratory system, skin, liver, central nervous system, and kidneys.

Medical Conditions Generally Aggravated by Exposure:  Pre-existing respiratory and gastric disorders, and an increased risk for individuals with Wilson's disease.

CarcinogenicityNTP:  No     IARC:  No     OSHA:  No



INHALATION:  Remove victim to fresh air, keep warm and quiet, give oxygen if breathing is difficult and seek medical attention.

INGESTION: Give 1-2 glasses of milk or water and induce vomiting, seek medical attention.  Never induce vomiting or give anything by mouth to an unconscious person. 

SKIN:  Remove contaminated clothing, brush material off skin, wash affected area with mild soap and water.  Seek medical attention if symptoms persist.

EYES:  Flush with lukewarm water, lifting upper and lower eyelids, for at least 15 minutes.  Seek medical attention if symptoms persist.



Stability:  Stable

Conditions to Avoid:  Heating to decomposition emits toxic fumes of SOx.  Avoid contact with water, steam or acids which will cause the production of toxic and flammable vapors of hydrogen sulfide.

Incompatibility (Material to Avoid):  Cadmium chlorate, chlorates, chloric acid, hydrogen peroxide, magnesium, ammonium nitrate, potassium chlorate and water, zinc chlorate, powerful oxidizers.

Hazardous Decomposition Products:  Hydrogen sulfide, oxides of copper and sulfur.

Hazardous Polymerization:  Will not occur.




Steps to Be Taken in Case Material Is Released or Spilled:  Wear appropriate respiratory and protective equipment specified in section VIII. Eliminate all sources of ignition. Isolate area and provide ventilation. Cover spill with vermiculite or sodium bicarbonate, collect into a plastic bag or wide mouthed glass container, close tightly and submit or retain for disposal.

Waste Disposal Method:  In accordance with Local, State and Federal Regulations for proper disposal of inorganic sulfides.




Respiratory Protection:  NIOSH/MSHA-approved high efficiency particulate respirator for ordinary use, self-contained breathing apparatus for emergency use.

Ventilation:  Handle in controlled, enclosed environment in an inert gas such as argon. Use local exhaust to maintain low levels of exposure. General exhaust is not recommended.

Protective Gloves:  Rubber

Eye Protection:  Chemical safety goggles.

Other Protective Clothing or Equipment:  Wear protective clothing to prevent contamination of skin and clothes.




Precautions to Be Taken in Handling and Storage:  Store in cool dry place in tightly sealed containers. Ensure good ventilation at the workplace. Open and handle container with care.  Keep container tightly sealed. Wash thoroughly after handling.

Other Precautions:  Handle and store under dry, protective gas such as argon. Store away from water/moisture. Do not store together with acids or oxidizing materials.

Work Practices:  Implement engineering and work practice controls to reduce and maintain concentration of exposure at low levels.  Use good housekeeping and sanitation practices.  Do not use tobacco or food in work area.  Wash thoroughly before eating and smoking.  Do not blow dust off clothing or skin with compressed air.  Maintain eyewash capable of sustained flushing, safety drench shower and facilities for washing.

TSCA Listed:  Yes

DOT Regulations:

Hazard Class:   None


The above information is believed to be correct, but does not purport to be all inclusive and shall be used only as a guide.  ESPI shall not be held liable for any damage resulting from handling or from contact with the above product.


Issued by:                    S. Dierks

Revised/Verified:          July 2012