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Identification

CAS: 12035-71-1

Name:
Heazlewoodite
Cas No.:
12035-71-1
Molecular Structure:
Molecular Structure of 12035-71-1 (Heazlewoodite)
EINECS(EC#):
Molecular Formula:
Ni3S2
Molecular Weight:
240.25
Synonyms:
12035-71-1 Chemical
Appearance:
 
mp :
 
bp :
 
Flash Point:
 
Density:
 
Water Solubility :
 
12035-71-1 Safety Data

Risk Codes:

Safety:

Confirmed carcinogen. When heated to decomposition it emits toxic vapors of SOx and Ni.

RTECS :

DG0875000

Chemistry
IUPACName:NickelsulfideMolecularFormula:Ni3S2MolecularWeight:240.25g/molDensity:5.8g/mLat25°C(lit.)EINECS:234-829-6Transportinformation:UN30779/PG3Properties:opaquetrigonal-trapezhedralcrystalwithlightbronzestreakColor:palebronzeFreelyRotatingBonds:0PolarSurfaceArea:32.09Å2AirandWaterReactions:Nickelsulfide-150MESH99.7%issensitivetoprolongedexposuretoair.Insolubleinwater.TheCasRegisterNumberofHeazlewooditeis12035-71-1.ThechemicalsynonymsofHeazlewoodite(CASNO.12035-71-1)areNickelsulfide-150mesh99.7%;Alpha-nickelsulfide(3:2)crystalline;Heazlewoodite[qr];Nickelsesquisulfide;Nickelsubsulfide;NickelsubsulphideThemolecularstructureofHeazlewoodite(CASNO.12035-71-1)is.
History

It is known from few ultramafic intrusions within terrestrial rocks. The Honeymoon Well ultramafic intrusive, Western Australia is known to contain heazlewoodite-millerite sulfide assemblages within serpentinized olivine adcumulate dunite, formed from the metamorphic process.

Uses

  Heazlewoodite (CAS NO.12035-71-1)  can be used in producing of Sulphur and Nickel .

Production

It is formed within terrestrial rocks by metamorphism of peridotite and dunite via a process of nucleation and only formed via metamorphic exsolution of sulfur from the lattice of metamorphic olivine.

Consensus Reports

IARC Cancer Review: Animal Sufficient Evidence IMEMDT    IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals to Man . 49 , 1990,p. 257.(World Health Organization, Internation Agency for Research on Cancer,Lyon, France.: ) (Single copies can be ordered from WHO Publications Centre U.S.A., 49 Sheridan Avenue, Albany, NY 12210) .

Safety Profile

Confirmed carcinogen. When heated to decomposition it emits toxic vapors of SOx and Ni.
Hazard Codes: ToxicT,DangerousN
Risk Statements: 49-43-51/53 
R49: May cause cancer by inhalation. 
R43: May cause sensitization by skin contact. 
R51/53: Toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment.
Safety Statements: 53-45-61 
S53: Avoid exposure - obtain special instructions before use. 
S45: In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) 
S61: Avoid release to the environment. Refer to special instructions / safety data sheets.

12035-71-1 Specification

 Heazlewoodite (CAS NO.12035-71-1) is a rare sulfur-poor nickel sulfide mineral found in serpentinitized dunite.It has a hardness of 4, a specific gravity of 5.82.

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