二硅化钼 | 12136-78-6

• 物质功能分类: 无机化工 - 无机盐 - 硅化物及硅酸盐
• 分子结构分类: 无机化合物 - 混合金属/非金属化合物 - 类金属盐
• 中文名称: 二硅化钼
• 中文别名: 硅化钼；硅化钼靶
• CAS: 12136-78-6
• 化学式: MoSi2
• 分子量: 152.12
• InChiKey: YXTPWUNVHCYOSP-UHFFFAOYSA-N

物化性质

• 熔点：
  1930°C
• 密度：
  6.31 g/mL at 25 °C(lit.)
• 溶解度：
  不溶于水；溶于HF
• 暴露限值：
  ACGIH: TWA 10 mg/m3; TWA 3 mg/m3NIOSH: IDLH 5000 mg/m3
• 稳定性/保质期：
  在常温常压下稳定，应避免与氧化物接触。室温时其比电阻为21.6×10^-6Ω·cm，不溶于大多数矿物酸（包括王水），但能被硝酸和氢氟酸的混合溶液溶解。它具有良好的高温抗氧化性能，在低于1700℃的氧化环境中可用作发热元件。

计算性质

• 辛醇/水分配系数(LogP)：
  -0.76
• 重原子数：
  3
• 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：
  0
• 氢给体数：
  0
• 氢受体数：
  0

安全信息

• TSCA：
  Yes
• 危险品标志：
  Xn
• 安全说明：
  S36
• 危险类别码：
  R20/21/22
• WGK Germany：
  3

SDS

---

Section 1: Product Identification
Chemical Name: Molybdenum silicide (99+%-Mo)
CAS Registry Number: 12136-78-6
Formula: MoSi2
EINECS Number: 235-231-8
Chemical Family: metal silicide
Synonym: Molybdenum disilicide

---

Section 2: Composition and Information on Ingredients
Ingredient CAS Number Percent ACGIH (TWA) OSHA (PEL)
Title compound 12136-78-6 100% 10mg/m3( as Mo) 15mg/m3 (as Mo)

---

Section 3: Hazards Identification
Emergency Overview: May be irritating to skin and eyes and respiratory tract.
Primary Routes of Exposure: Ingestion, inhalation
Eye Contact: May be a mild to severe irritant to the eyes.
Skin Contact: May cause slight to mild irritation of the skin.
Inhalation: Do not breath dust. Inhalation of powder may lead to irritation of the respiratory tract.
Ingestion: No information is available on the physiological effects of ingestion.
Acute Health Affects: May be irritating to skin, eyes, mucous membranes and respiratory tract. Do not breath dust.
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 in
Inhalation:
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: no data
Autoignition Temperature: no data
Explosion Limits: no data
Extinguishing Medium: carbon dioxide, dry powder or foam.
If involved in a fire, fire fighters should be equipped with NIOSH approved positive pressure self-contained
Special Fire Fighting Procedures:
breathing apparatus and full protective clothing.
Hazardous Combustion and No hazardous combustion or decomposition products.
Decomposion Products:
Unusual Fire or Explosion Hazards: No unusual fire or explosion hazards.

---

SECTION 6: Accidental Release Measures
Small spills can be mixed with vermiculite, sodium carbonate or other suitable non combustible adsorbent and
Spill and Leak Procedures:
swept up.

---

SECTION 7: Handling and Storage
Handling and Storage: No special precautions needed in handling and storage..

---

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 protective clothing and gloves. Consult with glove manufacturer to determine the proper type of glove.
Ventilation: Material may form a fine dust. If possible, handle the material in an efficient fume hood.
If ventilation is not available a respirator should be worn. The use of respirators requires a Respiratory
Respirator:
Protection Program to be in compliance with 29 CFR 1910.134.
Ventilation: Material may form a fine dust. 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: black powder
Molecular Weight: 152.13
Melting Point: no data
Boiling Point: no data
Vapor Pressure: no data
Specific Gravity: 6.31
Odor: none
Solubility in Water: insoluble

---

SECTION 10: Stability and Reactivity
Stability: air and moisture stable.
Hazardous Polymerization: No hazardous polymerization.
Conditions to Avoid: none
Incompatibility: oxidizing agents
Decomposition Products: none

---

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

制备方法与用途

用途 MoSi 主要应用于发热元件、集成电路、高温抗氧化涂层以及高温结构材料。

生产方法 通过直接反应 Mo 和 2Si，可以制备得到 MoSi₂。

反应信息

• 作为试剂：
  描述：

  氯甲酸苯酯 、 苯酚 在 二硅化钼 作用下， 反应 2.0h， 以10.3 g of diphenyl carbonate were formed的产率得到碳酸二苯酯
  参考文献：
  名称：

  Process for the production of aryl carbonates

  摘要：

  含芳香酯基的碳酸酯可以通过将芳香单羟基化合物与光气或芳香单羟基化合物的氯碳酸酯反应而制得。在存在具有金属样性质（陶瓷前体）的硬质材料作为异相催化剂的情况下，使用温度在50℃至450℃范围内，压力在0.05至20巴范围内。

  公开号：

  US05679825A1