Lead(II) sulfide
Lead(II) sulfide
CAS: 1314-87-0
Molecular Formula: PbS
Lead(II) sulfide - Names and Identifiers
| Name | Lead(II) sulfide |
| Synonyms | C.I. 77640 Lead sulfide Lead(II) sulfide thioxo-lambda~2~-plumbane galena, naturally occurring mineral, approximately 1-2in galena, naturally occurring mineral, grains, approximately 0.06-0.19in |
| CAS | 1314-87-0 |
| EINECS | 215-246-6 |
| InChI | InChI=1/Pb.S.4H/q+2;-2;;;;/rH4Pb.S/h1H4;/q+2;-2 |
| InChIKey | XCAUINMIESBTBL-UHFFFAOYSA-N |
Lead(II) sulfide - Physico-chemical Properties
| Molecular Formula | PbS |
| Molar Mass | 239.26 |
| Density | 7.5g/mLat 25°C(lit.) |
| Melting Point | 1114°C |
| Boling Point | 1281°C (estimate) |
| Water Solubility | Soluble in water (0.00086g/L) and acid. Insoluble in alcohol, and potassium hydroxide. |
| Solubility | Soluble in strong HNO3, in excess of hot HCl |
| Appearance | Brown deep powder |
| Specific Gravity | 7.5 |
| Color | White |
| Exposure Limit | ACGIH: TWA 0.05 mg/m3NIOSH: IDLH 100 mg/m3; TWA 0.050 mg/m3 |
| Solubility Product Constant(Ksp) | pKsp: 27.1 |
| Merck | 14,5421 |
| Storage Condition | 2-8°C |
| Stability | Stable. Incompatible with oxidizing agents, acids, water. |
| Refractive Index | 3.921 |
| MDL | MFCD00016280 |
| Use | Used as a spectral purity reagent |
Lead(II) sulfide - Risk and Safety
| Risk Codes | R61 - May cause harm to the unborn child R20/22 - Harmful by inhalation and if swallowed. R33 - Danger of cumulative effects R50/53 - Very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment. R62 - Possible risk of impaired fertility |
| Safety Description | 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.) S60 - This material and its container must be disposed of as hazardous waste. S61 - Avoid release to the environment. Refer to special instructions / safety data sheets. |
| UN IDs | UN 3077 9/PG 3 |
| WGK Germany | 3 |
| RTECS | OG4550000 |
| TSCA | Yes |
| Hazard Class | 6.1(b) |
| Packing Group | III |
| Toxicity | LD50 i.p. in rats: 160 mg Pb/100 g (Bradley, Fredrick) |
Lead(II) sulfide - Introduction
Partial volatilization at high temperature, soluble in acid, insoluble in water, insoluble in alkali. Soluble in nitric acid.
Last Update：2022-10-16 17:13:18
Lead(II) sulfide - Reference Information
| crystal structure | Cubic, Halite Structure - Space Group Fm3m |
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| solubility in water (g/100ml) | dissolved grams per 100ml of water: 6.767 × 10-13/20 ℃ |
| Use | Used as a spectral purity reagent High purity can be used as a semiconductor. |
| production method | 1. dissolve 75 gPbAc2 · 3H2O in 1000mL distilled water, and add solid NaOH until the generated Pb(OH)2 precipitate is completely dissolved to generate lead (ii) sodium Na2Pb(OH)4 solution. Another 17g of thiourea is dissolved in 1000mL of water and filtered. The two solutions of equal volume are mixed and heated to boiling under stirring. When the temperature is between 38 ℃ and 40 ℃, the solution turns brown. When heated to 50 ℃, PbS crystals begin to precipitate, forming a shiny PbS mirror on the beaker wall and bottom. To prevent boiling, the solution is moved into another beaker and kept boiling for 10min to completely precipitate PbS. Suction filtration crystallization, washing with cold water until the filtrate is not alkaline, precipitation in an oven to dry. If hydrogen sulfide gas is introduced into the acidic divalent lead salt aqueous solution, amorphous or partially crystalline PbS precipitate will be obtained. 2. Place the mixture of lead carbonate and sulfur powder in a covered crucible, heat to 300 ℃: cool, crush and sift to produce black powder. Amorphous lead sulfide, dried calcium carbonate and sulfur are mixed in a mass ratio of 1:6:6, ground and burned under red heat. After cooling, it is soaked in water, precipitated and filtered, washed with dilute hydrochloric acid to produce crystalline lead sulfide. |
| category | toxic substances |
| toxicity classification | poisoning |
| acute toxicity | abdominal cavity-rat LDL0: 1810 mg/kg |
| flammability hazard characteristics | non-combustible; toxic sulfur oxides and lead smoke are produced at the fire site |
| storage and transportation characteristics | warehouse low temperature, ventilation, drying |
| fire extinguishing agent | water, carbon dioxide, dry powder, sand |
| occupational standard | TWA 0.1 mg/m3; STEL 0.3 mg/m3 |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
Last Update：2024-04-09 20:49:11
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