21548-73-2

• 常用中文名：硫化银
• 常用英文名：Silver sulfide
• CAS号：21548-73-2
• 分子式：Ag₂S
• 分子量：247.801
• 相关类别： 无机化工 无机盐 胶态贵金属及其化合物
• 发布时间：2018-08-24 09:56:47
• 更新时间：2024-01-02 17:01:43
• 【用途一】
  用作分析试剂
  【用途二】
  测定土垠中硫、氧、溴、碘离子。合金。 制造陶器。

名称

• 中文名: 硫化银
• 英文名: silver(i) sulfide
• 英文别名: Silver(1+) sulfidosilver; MFCD00003406; EINECS 244-438-2; Disilver(1+) sulfide

物化性质

• 密度: 7.234 g/mL at 25 °C(lit.)
• 熔点: 845 °C(lit.)
• 分子式: Ag₂S
• 分子量: 247.801
• 精确质量: 245.782257
• PSA: 25.30000
• LogP: 0.64820
• 外观性状: 黑色立方体晶体
• 储存条件:

  保持贮藏器密封

  放入紧密的贮藏器内，储存在阴凉，干燥的地方

• 稳定性:

  如果遵照规格使用和储存则不会分解

  避免接触氧化物，酸。β-Ag2S为灰黑色正交晶体，相对密度7.326，在175℃转化为α-Ag2S；α-Ag2S为黑色立方晶体，相对密度7.317，熔点825℃。硫化银极难溶于水；几乎不溶于稀的非氧化性酸；不溶于氨水和氨盐溶液；但溶于碱金属氰化物溶液和硝酸；浓H2SO4能将Ag2S转化为硫酸银和硫。硫化银在室温和空气中是稳定的，但在真空中加热至350℃以上，则有丝状金属银生成。若直接在空气中加热，则硫化银易被氧化成硫酸银。

• 计算化学:

  1.疏水参数计算参考值（XlogP）:无

  2.氢键供体数量:1

  3.氢键受体数量:1

  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1

  7.重原子数量:3

  8.表面电荷:0

  9.复杂度:2.8

  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:3

• 更多:

  1.性状：浅灰黑色重质粉末。

  2.密度（g/mL,25/4℃）：7.234

  3.相对蒸汽密度（g/mL,空气=1）：未确定

  4.熔点（ºC）：825

  5.沸点（ºC,常压）：未确定

  6.沸点（ºC,5.2kPa）：未确定

  7.折射率：未确定

  8.闪点（ºC）：未确定

  9.比旋光度（º）：未确定

  10.自燃点或引燃温度（ºC）：未确定

  11.蒸气压（kPa,25ºC）：未确定

  12.饱和蒸气压（kPa,60ºC）：未确定

  13.燃烧热（KJ/mol）：未确定

  14.临界温度（ºC）：未确定

  15.临界压力（KPa）：未确定

  16.油水（辛醇/水）分配系数的对数值：未确定

  17.爆炸上限（%,V/V）：未确定

  18.爆炸下限（%,V/V）：未确定

  19.溶解性：不溶于水和氨水。溶于硝酸、硫酸和氰化碱溶液。

MSDS

Name: Silver (I) sulfide 99.9% Material Safety Data Sheet Synonym: Non CAS: 21548-73-2 Section 1 - Chemical Product MSDS Name:Silver (I) sulfide 99.9% Material Safety Data Sheet Synonym:Non Section 2 - COMPOSITION, INFORMATION ON INGREDIENTS CAS# Chemical Name content EINECS# 21548-73-2 Silver sulfide 99.9 244-438-2 Hazard Symbols: None Listed. Risk Phrases: None Listed. Section 3 - HAZARDS IDENTIFICATION EMERGENCY OVERVIEW Light sensitive.The toxicological properties of this material have not been fully investigated. Potential Health Effects Eye: May cause eye irritation. No information regarding eye irritation and other potential effects was found. Skin: May cause skin irritation. No information regarding skin irritation and other potential effects was found. Ingestion: The toxicological properties of this substance have not been fully investigated. Inhalation: The toxicological properties of this substance have not been fully investigated. Chronic: No information found. Section 4 - FIRST AID MEASURES Eyes: Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately. Skin: Flush skin with plenty of water for at least 15 minutes while removing contaminated clothing and shoes. Get medical aid if irritation develops or persists. Ingestion: If victim is conscious and alert, give 2-4 cupfuls of milk or water. Get medical aid immediately. Inhalation: Get medical aid immediately. Remove from exposure and move to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Notes to Physician: Section 5 - FIRE FIGHTING MEASURES General Information: As in any fire, wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. Extinguishing Media: Use agent most appropriate to extinguish fire. Section 6 - ACCIDENTAL RELEASE MEASURES General Information: Use proper personal protective equipment as indicated in Section 8. Spills/Leaks: Clean up spills immediately, observing precautions in the Protective Equipment section. Section 7 - HANDLING and STORAGE Handling: Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Use with adequate ventilation. Avoid contact with eyes, skin, and clothing. Avoid ingestion and inhalation. Storage: Store in a cool, dry place. Keep container closed when not in use. Section 8 - EXPOSURE CONTROLS, PERSONAL PROTECTION Engineering Controls: Use process enclosure, local exhaust ventilation, or other engineering controls to control airborne levels. Exposure Limits CAS# 21548-73-2: Japan: (listed as silver compounds): 0.01 mg/m3 OEL (as Ag) Personal Protective Equipment Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear appropriate protective gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to minimize contact with skin. Respirators: Follow the OSHA respirator regulations found in 29 CFR 1910.134 or European Standard EN 149. Use a NIOSH/MSHA or European Standard EN 149 approved respirator if exposure limits are exceeded or if irritation or other symptoms are experienced. Section 9 - PHYSICAL AND CHEMICAL PROPERTIES Physical State: Solid Color: black Odor: Not available. pH: Not available. Vapor Pressure: Not available. Viscosity: Not available. Boiling Point: Not available. Freezing/Melting Point: 845 deg C Autoignition Temperature: Not available. Flash Point: Not available. Explosion Limits, lower: Not available. Explosion Limits, upper: Not available. Decomposition Temperature: Solubility in water: Specific Gravity/Density: 7.2340g/cm3 Molecular Formula: Ag2S Molecular Weight: 247.80 Section 10 - STABILITY AND REACTIVITY Chemical Stability: Stable under normal temperatures and pressures. Conditions to Avoid: None reported. Incompatibilities with Other Materials: None reported.. Hazardous Decomposition Products: Irritating and toxic fumes and gases. Hazardous Polymerization: Has not been reported Section 11 - TOXICOLOGICAL INFORMATION RTECS#: CAS# 21548-73-2 unlisted. LD50/LC50: Not available. Carcinogenicity: Silver sulfide - Not listed by ACGIH, IARC, or NTP. Section 12 - ECOLOGICAL INFORMATION Section 13 - DISPOSAL CONSIDERATIONS Dispose of in a manner consistent with federal, state, and local regulations. Section 14 - TRANSPORT INFORMATION IATA Not regulated as a hazardous material. IMO Not regulated as a hazardous material. RID/ADR Shipping Name: Not regulated. Hazard Class: UN Number: Packing group: Section 15 - REGULATORY INFORMATION European/International Regulations European Labeling in Accordance with EC Directives Hazard Symbols: Not available. Risk Phrases: Safety Phrases: S 24/25 Avoid contact with skin and eyes. WGK (Water Danger/Protection) CAS# 21548-73-2: 0 Canada CAS# 21548-73-2 is listed on Canada's DSL List. CAS# 21548-73-2 is not listed on Canada's Ingredient Disclosure List. US FEDERAL TSCA CAS# 21548-73-2 is listed on the TSCA inventory. SECTION 16 - ADDITIONAL INFORMATION N/A

毒性和生态

毒理学数据: 有刺激性 生态学数据: 通常来说对水是不危害的，若无政府许可，勿将材料排入周围环境

安全

• 个人防护装备: dust mask type N95 (US);Eyeshields;Gloves
• 危害码 (欧洲): Xi: Irritant;
• 风险声明 (欧洲): R36/37/38
• 安全声明 (欧洲): S26-S36
• 危险品运输编码: NONH for all modes of transport
• WGK德国: 3

制备

1.在90～100℃条件下，将氧化银(Ⅰ)与硫反应生成硫化银(Ⅰ)，当有水气存在时，Ag2SO4也能被过量硫转化为硫化银(Ⅰ)。

2.将硫代硫酸钠与氧化银(Ⅰ)、硝酸银等可溶性银盐反应，可得硫化银(Ⅰ)

3.将可溶性银盐与可溶性硫化物反应，制得硫化银(Ⅰ)