18868-43-4

• 常用中文名：二氧化钼
• 常用英文名：Dioxomolybdenum
• CAS号：18868-43-4
• 分子式：MoO₂
• 分子量：127.939
• 相关类别： 无机化工 氧化物和过氧化物 金属氧化物
• 发布时间：2018-02-04 08:00:00
• 更新时间：2024-01-02 17:35:43
• 下载msds

名称

• 中文名: 二氧化钼
• 英文名: dioxomolybdenum
• 中文别名: 氧化钼
• 英文别名: molybdenum dioxide; MoO2; EINECS 242-637-9; molybdenum oxide; Molybdenum, dioxo-; Molybdenum(IV) oxide; MFCD00014223; Dioxomolybdenum

物化性质

• 密度: 6.47 g/mL at 25ºC(lit.)
• 分子式: MoO₂
• 分子量: 127.939
• 精确质量: 129.895233
• PSA: 34.14000
• 外观性状: 灰色至黑色粉末
• 储存条件:

  常温密闭避光，通风干燥惰性气体下

• 稳定性:

  常温常压下稳定

  避免的物料：氧化物 酸 空气。

  具有变形的金红石结构，由无限的在相反方向共边的MoO6八面体链组成；Mo—Mo键距的长短沿链的方向交替地变化，长的为0.310nm，短的为0.250nm，它是抗磁性并呈半导体性质，含有金属金属键。具有像铜那样的光泽，是电的良导体。不溶于水、盐酸、氢氟酸、也不溶于碱金属氢氧化物和碱金属碳酸盐的水溶液。因为具有碱性，多多少少能溶解于硫酸中。

• 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:2

  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34.1

  7.重原子数量:3

  8.表面电荷:0

  9.复杂度:18.3

  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:1

• 更多:

  1. 性状：呈紫色或棕色。

  2. 密度（g/mL,25/4℃）：4.696

  3. 相对蒸汽密度（g/mL,空气=1）：不确定

  4. 熔点（ºC）：不确定

  5. 沸点（ºC,常压）：不确定

  6. 沸点（ºC, 5.2kPa）：不确定

  7. 折射率：不确定

  8. 闪点（ºC）：不确定

  9. 比旋光度（º）：不确定

  10. 自燃点或引燃温度（ºC）：不确定

  11. 蒸气压（kPa,25ºC）：不确定

  12. 饱和蒸气压（kPa,60ºC）：不确定

  13. 燃烧热（KJ/mol）：不确定

  14. 临界温度（ºC）：不确定

  15. 临界压力（KPa）：不确定

  16. 油水（辛醇/水）分配系数的对数值：不确定

  17. 爆炸上限（%,V/V）：不确定

  18. 爆炸下限（%,V/V）：不确定

  19. 溶解性：不确定

MSDS

Section 1: Product Identification Chemical Name:Molybdenum (IV) oxide, 99% CAS Registry Number:18868-43-4 Formula:MoO2 EINECS Number:242-637-7 Chemical Family:metal oxide Synonym:Molybdenum dioxide, Molybdenous oxide. Section 2: Composition and Information on Ingredients IngredientCAS NumberPercentACGIH (TWA)OSHA (PEL) Title Compound18868-43-4100%10mg/m3 (as Mo-15mg/m3 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:Ingestion may lead to vomiting and diarrhea. 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 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:none Explosion Limits:none Extinguishing Medium:None. Material is non-flammable. Special Fire Fighting Procedures:Non-flammable. No special fire fighting procedures. Hazardous Combustion andNo hazardous combustion or decomposition products. Decomposion Products: Unusual Fire or Explosion Hazards: No unusual fire or explosion hazards. SECTION 6: Accidental Release Measures Spill and Leak Procedures:Small spills can be mixed with vermiculite or sodium carbonate and swept up. SECTION 7: Handling and Storage Handling and Storage:Store in a tightly sealed container. 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: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 Respirator 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:purple pwdr. Molecular Weight:127.95 Melting Point:no data Boiling Point:no data Vapor Pressure:no data Specific Gravity:6.47 Odor:none Solubility in Water:insoluble SECTION 10: Stability and Reactivity Stability:air and moisture stable solid Hazardous Polymerization:no hazardous polymerization Conditions to Avoid:none Incompatibility:none Decomposition Products:none SECTION 11: Toxicological Information RTECS Data:Subcutaneous (mouse); LD50:318 mg/kg. Carcinogenic Effects:No data available Mutagenic Effects:No data available Tetratogenic Effects:No data available 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

毒理学数据: 急性毒性：小鼠皮下注射LD50：318 mg/kg 生态学数据: 通常对水体是稍微有害的，不要将未稀释或大量产品接触地下水，水道或污水系统，未经政府许可勿将材料排入周围环境。 CHEMICAL IDENTIFICATION RTECS NUMBER : QA4688000 CHEMICAL NAME : Molybdenum oxide CAS REGISTRY NUMBER : 18868-43-4 LAST UPDATED : 199712 DATA ITEMS CITED : 37 MOLECULAR FORMULA : Mo-O2 HEALTH HAZARD DATA ACUTE TOXICITY DATA TYPE OF TEST : LD50 - Lethal dose, 50 percent kill ROUTE OF EXPOSURE : Subcutaneous SPECIES OBSERVED : Rodent - mouse DOSE/DURATION : 318 mg/kg TOXIC EFFECTS : Details of toxic effects not reported other than lethal dose value REFERENCE : ZVKOA6 Zhurnal Vsesoyuznogo Khimicheskogo Obshchestva im. D.I. Mendeleeva. Journal of the D.I. Mendeleeva All-Union Chemical Society. (V/O Mezhdunarodnaya Kniga, 113095 Moscow, USSR) V.5- 1960- Volume(issue)/page/year: 19,186,1974 *** REVIEWS *** ACGIH TLV-TWA 10 mg(Mo)/m3 DTLVS* The Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) booklet issues by American Conference of Governmental Industrial Hygienists (ACGIH), Cincinnati, OH, 1996 Volume(issue)/page/year: TLV/BEI,1997 *** U.S. STANDARDS AND REGULATIONS *** MSHA STANDARD-air:TWA 5 mg(Mo)/m3 DTLVS* The Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) booklet issues by American Conference of Governmental Industrial Hygienists (ACGIH), Cincinnati, OH, 1996 Volume(issue)/page/year: 3,173,1971 OSHA PEL (Gen Indu):8H TWA 15 mg(Mo)/m3, total dust CFRGBR Code of Federal Regulations. (U.S. Government Printing Office, Supt. of Documents, Washington, DC 20402) Volume(issue)/page/year: 29,1910.1000,1994 OSHA PEL (Gen Indu):8H TWA 5 mg(Mo)/m3 CFRGBR Code of Federal Regulations. (U.S. Government Printing Office, Supt. of Documents, Washington, DC 20402) Volume(issue)/page/year: 29,1910.1000,1994 OSHA PEL (Construc):8H TWA 15 mg(Mo)/m3, total dust CFRGBR Code of Federal Regulations. (U.S. Government Printing Office, Supt. of Documents, Washington, DC 20402) Volume(issue)/page/year: 29,1926.55,1994 OSHA PEL (Construc):8H TWA 5 mg(Mo)/m3 CFRGBR Code of Federal Regulations. (U.S. Government Printing Office, Supt. of Documents, Washington, DC 20402) Volume(issue)/page/year: 29,1926.55,1994 OSHA PEL (Shipyard):8H TWA 15 mg(Mo)/m3, total dust CFRGBR Code of Federal Regulations. (U.S. Government Printing Office, Supt. of Documents, Washington, DC 20402) Volume(issue)/page/year: 29,1915.1000,1993 OSHA PEL (Shipyard):8H TWA 5 mg(Mo)/m3 CFRGBR Code of Federal Regulations. (U.S. Government Printing Office, Supt. of Documents, Washington, DC 20402) Volume(issue)/page/year: 29,1915.1000,1993 OSHA PEL (Fed Cont):8H TWA 15 mg(Mo)/m3, total dust CFRGBR Code of Federal Regulations. (U.S. Government Printing Office, Supt. of Documents, Washington, DC 20402) Volume(issue)/page/year: 41,50-204.50,1994 OSHA PEL (Fed Cont):8H TWA 5 mg(Mo)/m3 CFRGBR Code of Federal Regulations. (U.S. Government Printing Office, Supt. of Documents, Washington, DC 20402) Volume(issue)/page/year: 41,50-204.50,1994 *** OCCUPATIONAL EXPOSURE LIMITS *** OEL-AUSTRALIA:TWA 10 mg(Mo)/m3 JAN 1993 OEL-AUSTRALIA:TWA 5 mg(Mo)/m3 JAN 1993 OEL-BELGIUM:TWA 10 mg(Mo)/m3 JAN 1993 OEL-BELGIUM:TWA 5 mg(Mo)/m3 JAN 1993 OEL-DENMARK:TWA 10 mg(Mo)/m3 JAN 1993 OEL-DENMARK:TWA 5 mg(Mo)/m3 JAN 1993 OEL-FINLAND:TWA 5 mg(Mo)/m3 JAN 1993 OEL-FRANCE:TWA 5 mg(Mo)/m3;STEL 10 mg(Mo)/m3 JAN 1993 OEL-GERMANY:TWA 15 mg(Mo)/m3 JAN 1993 OEL-GERMANY:TWA 5 mg(Mo)/m3 JAN 1993 OEL-THE NETHERLANDS:TWA 10 mg(Mo)/m3 JAN 1993 OEL-THE NETHERLANDS:TWA 5 mg(Mo)/m3 JAN 1993 OEL-THE PHILIPPINES:TWA 15 mg(Mo)/m3 JAN 1993 OEL-THE PHILIPPINES:TWA 5 mg(Mo)/m3 JAN 1993 OEL-SWEDEN:TWA 10 mg(Mo)/m3 (total dust) JAN 1993 OEL-SWEDEN:TWA 5 mg(Mo)/m3 (resp. dust) JAN 1993 OEL-SWITZERLAND:TWA 10 mg(Mo)/m3 JAN 1993 OEL-SWITZERLAND:TWA 5 mg(Mo)/m3 JAN 1993 OEL-TURKEY:TWA 15 mg(Mo)/m3 JAN 1993 OEL-TURKEY:TWA 5 mg(Mo)/m3 JAN 1993 OEL-UNITED KINGDOM:TWA 10 mg(Mo)/m3;STEL 20 mg(Mo)/m3 JAN 1993 OEL-UNITED KINGDOM:TWA 5 mg(Mo)/m3;STEL 10 mg/m3 JAN 1993 OEL IN BULGARIA, COLOMBIA, JORDAN, KOREA check ACGIH TLV OEL IN NEW ZEALAND, SINGAPORE, VIETNAM check ACGIH TLV

安全

• 个人防护装备: dust mask type N95 (US);Eyeshields;Gloves
• 危害码 (欧洲): Xn
• 风险声明 (欧洲): R20/21/22
• 安全声明 (欧洲): 26-36
• 危险品运输编码: NONH for all modes of transport
• WGK德国: 1
• RTECS号: QA4688000
• 海关编码: 2825700000

制备

1.三氧化钼的氢气还原法。将三氧化钼装入瓷盘，在氢气流中加热到450℃保持5～7h，按上述反应生成二氧化钼并混有三氧化钼。然后，在反应生成物的上部通入氯化氢气体的条件下于暗红热处焙烧时，未反应的三氧化钼变为MoO3·2HCl而挥发掉，剩下的MoO2在氢气流中冷却之。或者将170～325目的三氧化钼粉末装入瓷盘，送到高温干燥的反应管中，然后通氢气把反应管内空气完全置换出去。在氢气流中升温到550～700℃大约保持1h，三氧化钼全部被还原为二氧化钼

2.用金属钼还原三氧化钼的方法，按2∶1的摩尔比准确称取三氧化钼和金属钼粉并充分混合之。将混合物装入石英管，反应管内要彻底排气。加热到700℃保持40h，则得到棕色结晶状粉末。

在氧气的存在下，小心加热金属钼时，作为中间生成物也可以得到二氧化钼。

海关

海关编码	2825700000