硫化镧 | 12031-49-1

• 分子结构分类: 无机化合物 - 混合金属/非金属化合物 - 各种混合金属/非金属
• 中文名称: 硫化镧
• 中文别名: 硫化镧(III)
• 英文名称: Lanthanum sulfide
• 英文别名: lanthanum(3+);trisulfide
• CAS: 12031-49-1
• 化学式: La2S3
• 分子量: 374.0
• InChiKey: YTYSNXOWNOTGMY-UHFFFAOYSA-N

物化性质

• 稳定性/保质期：
  遵照规定使用和储存，则不会分解，且具有Th3P4的结构。

计算性质

• 辛醇/水分配系数(LogP)：
  -0.01
• 重原子数：
  5
• 可旋转键数：
  0
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.0
• 拓扑面积：
  3
• 氢给体数：
  0
• 氢受体数：
  3

ADMET

毒理性

• 副作用

纤维原性 - 引发组织损伤和纤维化（疤痕形成）。

Fibrogenic - Inducing tissue injury and fibrosis (scarring).

来源:Haz-Map, Information on Hazardous Chemicals and Occupational Diseases

安全信息

• 安全说明：
  S22,S36/37/39
• 危险类别码：
  R36/37/38,R31
• 危险品运输编号：
  UN3134
• 包装等级：
  II,III
• 危险类别：
  4.3

SDS

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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

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Section 2: Composition and Information on Ingredients
Ingredient CAS Number Percent ACGIH (TWA) OSHA (PEL)
Title Compound 12031-49-1 100% no data no data

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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

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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.

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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 and If 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.

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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.

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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.

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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.

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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

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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.

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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

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SECTION 12: Ecological Information
Ecological Information: No information available

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SECTION 13: Disposal Considerations
Disposal: Dispose of according to local, state and federal regulations.

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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

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SECTION 15: Regulatory Information
TSCA: Listed in the TSCA inventory.
SARA (Title 313): Title compound not listed.
Second Ingredient: none

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SECTION 16 - ADDITIONAL INFORMATION
N/A

制备方法与用途

制备方法

1. 将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。当反应完成并温度升至1200℃后维持20小时，随后冷却到室温，并用水洗掉LaI3。使用二温区炉进行La2S3的化学传输。

   • 将1.3891g（0.01mol）镧和0.4810g（0.015mol）硫放入直径为10mm的一端封闭石英管中，并抽真空后熔封成约20cm长的安瓿。将此安瓿置于两温区炉或温度梯度炉中，确保所有反应物初始在热端。
   • 将热区升温至400℃，另一温区保持100℃。硫会向冷区迁移，生成硫蒸气并控制与镧的反应（若整个安瓿加热至400℃，可能会导致猛烈反应和安瓿损坏）。
   • 当所有硫反应完毕后，将安瓿移入马福炉中，并在1000℃下保持10小时。使用二温区炉进行硫化镧的化学传输。

在反应过程中，若石英安瓿缺乏防护措施，会严重受损。长时间高温加热也可能引起问题。保护方法包括使用碳素材料涂层或石墨坩埚，通常是在石英管壁上简单地涂一层碳素。具体操作为：将苯倒入一端封闭的石英管中，倾出后使残余部分粘附在管壁上，并将此管放入800℃高温炉中加热几分钟。

合成制备方法

1. 将La、S、I2以原子比1∶1∶1的比例密封于抽真空的石英管中，缓慢加热以避免剧烈反应。待反应完成并温度升至1200℃后维持20小时，冷却到室温并用水洗去LaI3。

   • 将1.3891g（0.01mol）镧和0.4810g（0.015mol）硫放入直径为10mm的一端封闭石英管中，并抽真空后熔封成约20cm长的安瓿。
   • 将此安瓿置于两温区炉或温度梯度炉中，确保所有反应物初始在热端。将热区升温至400℃，另一温区保持100℃。硫会向冷区迁移生成硫蒸气并控制与镧的反应（若整个安瓿加热至400℃，可能会导致猛烈反应和安瓿损坏）。
   • 当所有硫反应完毕后，将安瓿移入马福炉中，并在1000℃下保持10小时。

在反应过程中，石英安瓿若没有防护措施会严重受损。长时间高温加热也可能引起问题。保护方法包括使用碳素材料涂层或石墨坩埚，通常是在石英管壁上简单地涂一层碳素。具体操作为：将苯倒入一端封闭的石英管中，倾出后使残余部分粘附在管壁上，并将此管放入800℃高温炉中加热几分钟。