12031-49-1

• 常用中文名：硫化镧
• 常用英文名：Lanthanum Sulfide
• CAS号：12031-49-1
• 分子式：La₂S₃
• 分子量：374.00600
• 相关类别： 无机化工 无机盐 金属硫化物及硫酸盐
• 发布时间：2018-02-11 08:00:00
• 更新时间：2024-01-06 13:42:56

名称

• 中文名: 硫化镧(III)
• 英文名: lanthanum(3+),trisulfide
• 中文别名: 硫化镧
• 英文别名: EINECS 234-752-8; Dilanthanum trisulphide; Dilanthanum trisulfide; Lanthanum sesquisulfide; Lanthanum Sulfide

物化性质

• 密度: 4.91
• 熔点: 2100-2150ºC
• 分子式: La₂S₃
• 分子量: 374.00600
• 精确质量: 373.72900
• PSA: 89.48000
• LogP: 1.94460
• 外观性状: Powder
• 储存条件:

  密闭于阴凉干燥环境中

• 稳定性:

  遵照规定使用和储存则不会分解。具有Th3P4的结构

• 分子结构:

  1、摩尔折射率：无可用

  2、 摩尔体积（cm³/mol）：无可用

  3、 等张比容（90.2K）：无可用

  4、 表面张力（dyne/cm）：无可用

  5、 极化率：无可用

• 计算化学:

  1.疏水参数计算参考值（XlogP）:无

  2.氢键供体数量:0

  3.氢键受体数量:3

  4.可旋转化学键数量:0

  5.互变异构体数量:无

  6.拓扑分子极性表面积3

  7.重原子数量:5

  8.表面电荷:0

  9.复杂度:0

  10.同位素原子数量:0

  11.确定原子立构中心数量:0

  12.不确定原子立构中心数量:0

  13.确定化学键立构中心数量:0

  14.不确定化学键立构中心数量:0

  15.共价键单元数量:5

• 更多:

  1. 性状：红色粉末

  2. 密度（g/mL,25/4℃）：4,911

  3. 相对蒸汽密度（g/mL,空气=1）：无可用

  4. 熔点（ºC）：2100-2150

  5. 沸点（ºC,常压）：无可用

  6. 沸点（ºC,5.2kPa）：无可用

  7. 折射率：无可用

  8. 闪点（ºC）：无可用

  9. 比旋光度（º）：无可用

  10. 自燃点或引燃温度（ºC）：无可用

  11. 蒸气压（kPa,25ºC）：无可用

  12. 饱和蒸气压（kPa,60ºC）：无可用

  13. 燃烧热（KJ/mol）：无可用

  14. 临界温度（ºC）：无可用

  15. 临界压力（KPa）：无可用

  16. 油水（辛醇/水）分配系数的对数值：无可用

  17. 爆炸上限（%,V/V）：无可用

  18. 爆炸下限（%,V/V）：无可用

  19. 溶解性：无可用

MSDS

Section 1: Product Identification Chemical Name:Lanthanum (III) sulfide (99.9%-La) (REO) CAS Registry Number:12031-49-1 Formula:La2S3 EINECS Number:234-752-8 Chemical Family:metal chalcogenides Synonym:none Section 2: Composition and Information on Ingredients IngredientCAS NumberPercentACGIH (TWA)OSHA (PEL) Title Compound12031-49-1100%no datano data Section 3: Hazards Identification Emergency Overview:Forms highly toxic gas on exposure to acids or stomach fluids. Irritating to skin, eyes, and respiratory tract. Primary Routes of Exposure:Ingestion, inhalation, skin and eyes Eye Contact:Causes moderate irritation of the eyes. Skin Contact:Causes slight irritation of the skin. Inhalation:Inhalation of dust will lead to irritation of the respiratory tract. Hydrogen sulfide gas, if formed, is poisonous. Ingestion:Gastric juices may cause release of toxic hydrogen sulfide. Irritating to skin, eyes and respiratory tract. Hydrogen sulfide gas may cause painful conjunctivitis, headache, Acute Health Affects: nausea, dizziness, pulmonary edema and possible death. Chronic Health Affects:No information available on long-term chronic effects. NTP:No IARC:No OSHA:No SECTION 4: First Aid Measures Immediately flush the eyes with copious amounts of water for at least 10-15 minutes. A victim may need Eye Exposure: assistance in keeping their eye lids open. Get immediate medical attention. Wash the affected area with water. Remove contaminated clothes if necessary. Seek medical assistance if Skin Exposure: irritation persists. Remove the victim to fresh air. Closely monitor the victim for signs of respiratory problems, such as difficulty Inhalation: in breathing, coughing, wheezing, or pain. In such cases seek immediate medical assistance. Seek medical attention immediately. Keep the victim calm. Give the victim water (only if conscious). Induce Ingestion: vomiting only if directed by medical personnel. SECTION 5: Fire Fighting Measures Flash Point:not applicable Autoignition Temperature:no data Explosion Limits:no data Extinguishing Medium:carbon dioxide or dry powder If this product is involved in a fire, fire fighters should be equipped with a NIOSH approved positive pressure Special Fire Fighting Procedures: self- contained breathing apparatus and full protective clothing. Hazardous Combustion andIf involved in a fire this material may emit irritating fumes of hydrogen sulfide and sulfur dioxide. Decomposion Products: Dust may form explosive mixtures with air. Contact with acids gives off hydrogen sulfide, a toxic and Unusual Fire or Explosion Hazards: flammable gas. SECTION 6: Accidental Release Measures In the case of a spill, the fine powder should be covered with dry sodium carbonate or dolomite in order to Spill and Leak Procedures: reduce the formation of dust. Sweep up the mixture. SECTION 7: Handling and Storage Store in a tightly sealed container. Exposure to the atmosphere may lead to release of toxic hydrogen sulfide Handling and Storage: gas. Empty containers may retain product residues that evolve toxic gases. SECTION 8: Exposure Controls and Personal Protection Eye Protection:Always wear approved safety glasses when handling a chemical substance in the laboratory. Skin Protection:Wear appropriate chemical resistant gloves and protective clothing. Ventilation:If possible, handle the material in an efficient fume hood. If ventilation is not available a respirator should be worn. The use of a respirators requires a Respirator Respirator: Protection Program to be in compliance with 29 CFR 1910.134. Ventilation:If possible, handle the material in an efficient fume hood. Additional Protection:No additional protection required. SECTION 9: Physical and Chemical Properties Color and Form:yellow powder Molecular Weight:374.01 Melting Point:2100-2150° Boiling Point:no data Vapor Pressure:no data Specific Gravity:4.911 Odor:odor of sulfur Solubility in Water:insoluble SECTION 10: Stability and Reactivity Stability:air and moisture stable Hazardous Polymerization:no hazardous polymerization Conditions to Avoid:Contact of dust cloud with an ignition source. Incompatibility:oxidizing agents and mineral acids Decomposition Products:hydrogen sulfide, sulfur dioxide, and metal oxides. SECTION 11: Toxicological Information RTECS Data:No information available in the RTECS files. Carcinogenic Effects:no data Mutagenic Effects:no data Tetratogenic Effects:no data SECTION 12: Ecological Information Ecological Information:No information available SECTION 13: Disposal Considerations Disposal:Dispose of according to local, state and federal regulations. SECTION 14: Transportation Shipping Name (CFR):Non-hazardous Hazard Class (CFR):NA Additional Hazard Class (CFR):NA Packaging Group (CFR):NA UN ID Number (CFR):NA Shipping Name (IATA):Non-hazardous Hazard Class (IATA):NA Additional Hazard Class (IATA):NA Packaging Group (IATA):NA UN ID Number (IATA):NA SECTION 15: Regulatory Information TSCA:Listed in the TSCA inventory. SARA (Title 313):Title compound not listed. Second Ingredient:none SECTION 16 - ADDITIONAL INFORMATION N/A

毒性和生态

生态学数据: 该物质对环境可能有危害，对水体应给予特别注意。

安全

• 风险声明 (欧洲): 31-36/37/38
• 安全声明 (欧洲): S22-S36/37/39
• 危险品运输编码: UN3134
• 包装等级: III
• 危险类别: 4.3

制备

1.La、S、I2以原子比1∶1∶1的量密封在抽真空的石英管中，缓慢加热以避免剧烈反应。反应(形成LaSI)完成后，温度上升到1200℃，维持20h，然后冷却到室温，用水洗掉LaI3。图使用二温区炉的La2S3的化学传输

2.1.3891g(0.01mol)镧和0.4810g(0.015mol)硫放进一支直径为10mm一端封闭的石英管里，将管子抽真空并熔封成一支长度约20cm的安瓿。把这支安瓿放在一座两温区炉或温度梯度炉里，使所有的反应物最初都放在热端。将热区的温度升高到400℃，同时将另一温区保持在100℃。硫很快地向冷区迁移，因而硫蒸气将能以有控制的状况而同镧反应(如果把整个安瓿加热到400℃，将发生猛烈的反应，并对安瓿发生侵蚀作用，还可能把安瓿弄碎)。当所有的硫反应完时，把安瓿转移到一座马福炉中并加热到1000℃，保持10h。

图III-3 使用二温区炉的硫化镧的化学传输

在反应中，石英安瓿若没有防护措施将会严重地被侵蚀。如果采用高温和长时间加热，也可能出现此问题。可以使用碳素材料凃层来保护石英，也可以使用石墨坩埚。但一般通过苯的热解在石英管壁上简单地涂上一层碳素。方法如下：在一支一端封闭的石英管里倒入苯，然后把苯倾出，使残余的部分粘在管壁上，把这支管子放在800℃的高温炉中加热几分钟。