7784-25-0

• 常用中文名：硫酸铝铵
• 常用英文名：Aluminum ammonium sulfate
• CAS号：7784-25-0
• 分子式：H₄AlNO₈S₂
• 分子量：237.145
• 相关类别： 食品添加剂 膨松剂
• 发布时间：2018-02-07 08:00:00
• 更新时间：2024-01-02 10:01:00
• 【用途一】
  用作净水凝聚剂、印染媒染剂、制革铝鞣剂、纸张上浆剂、黄色玻璃着色剂、医药收敛剂及食品膨松剂等
  【用途二】
  缓冲剂；中和剂；膨松剂；水质净化剂；腌菜及煮、炖食品的护色剂。
  参考用量：腌茄子0.01%～0.1%(以Al计)，铵明矾中的铝和铁盐遇茄子的蓝色色素形成络盐而不褪色。
  亦用于煮熟的红章鱼护色。甘薯泥加栗子的甜食、牛蒡丝加酱油加糖等用油炒的食品，在煮熬前在牛蒡丝或栗子中加入0.01%铵矾。系利用铵矾的收敛作用，改善咀嚼感。面包、糕饼类的膨松剂原料(酸性剂)，添加量为小麦粉的0.15%～0.5%。
  【用途三】
  作净水剂和膨松剂，可代替钾明矾。我国规定可用于油炸食品、虾片、豆制品、发酵粉、威夫饼干、膨化食品和水产品，按生产需要适量使用，铝的残留量≤l00mg／kg。
  【用途四】
  用于原水和地下水的净化以及工业用水处理。
  【用途五】
  膨松剂；净水剂；护色剂(腌菜等)。在日本不得用于于豆酱。
  因不含结晶水，能将混合型膨松剂中其他原料中的水分吸收而成为结晶水，以保持膨松剂质量。在水中的溶解速度和与碳酸氢钠的反应均甚缓慢，故可保持较长时间的产气效果。

名称

• 中文名: 硫酸铝铵
• 英文名: aluminum,azanium,disulfate
• 英文别名: Exsiccated ammonium alum; Curb; Ammonium aluminum alum; Alum ammonium; Aluminum ammonium sulfate (1:1:2); Aluminum ammonium alum; Ammonium aluminum sulfate; EINECS 232-055-3; MFCD00051042; Burnt ammonium alum; Caswell No. 041B; UNII-DPU64XYB1D; Aluminium ammonium sulfate (1:1:2)

物化性质

• 密度: 1.64
• 沸点: 330ºC at 760 mmHg
• 熔点: 93.5℃
• 分子式: H₄AlNO₈S₂
• 分子量: 237.145
• 精确质量: 236.919373
• PSA: 177.69000
• LogP: 0.48960
• 储存条件:

  1.因硫酸铝铵易腐蚀，所以不宜久存。潮包应分开堆垛，随时处理，防止淌水流失，产品不得与有毒或其他污染物品共贮混运。运输过程中要防止雨淋和日晒。

• 稳定性:

  120ºC失去10分子结晶水，250ºC变为无水物，280ºC以上分解。0.05mol/L水溶液PH值4.6。可溶于水，在280℃以上发生分解，在1000～1250℃时形成δ-Al2O3。

• 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:8

  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178

  7.重原子数量:12

  8.表面电荷:0

  9.复杂度:62.2

  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:4

• 更多:

  1. 性状：白色结晶或白色结晶性颗粒或粉末。无臭、味涩。

  2. 密度(g/mL,25/4℃）：1.64

  3. 相对蒸汽密度（g/mL,空气=1）：

  4. 熔点（ºC）：93.5

  5. 沸点（ºC,常压）：

  6. 沸点（ºC,5.2kPa）：

  7. 折射率：

  8. 闪点（ºC）：

  9. 比旋光度（º）：

  10. 自燃点或引燃温度（ºC）：

  11. 蒸气压（kPa,25ºC）：

  12. 饱和蒸气压（kPa,60ºC）：

  13. 燃烧热（KJ/mol）：

  14. 临界温度（ºC）：

  15. 临界压力（KPa）：

  16. 油水（辛醇/水）分配系数的对数值：

  17. 爆炸上限（%,V/V）：

  18. 爆炸下限（%,V/V）：

  溶解性： 微溶于水、甘油，不溶于乙醇和丙酮。

MSDS

Name: Aluminum ammonium sulfate dodecahydrate 99% Material Safety Data Sheet Synonym: Ammonium aluminum sulfate dodecahydrate; Ammonium alum; Aluminum ammonium sulfate, 12-hydrate; Ammonia alum CAS: 7784-25-0 Section 1 - Chemical Product MSDS Name:Aluminum ammonium sulfate dodecahydrate 99% Material Safety Data Sheet Synonym:Ammonium aluminum sulfate dodecahydrate; Ammonium alum; Aluminum ammonium sulfate, 12-hydrate; Ammonia alum Section 2 - COMPOSITION, INFORMATION ON INGREDIENTS CAS# Chemical Name content EINECS# 7784-25-0 Aluminum ammonium sulfate dodecahydrat 99 unlisted Hazard Symbols: None Listed. Risk Phrases: None Listed. Section 3 - HAZARDS IDENTIFICATION EMERGENCY OVERVIEW Not available. Potential Health Effects Eye: May cause eye irritation. Skin: May cause skin irritation. Ingestion: May cause irritation of the digestive tract. The toxicological properties of this substance have not been fully investigated. Inhalation: May cause respiratory tract irritation. The toxicological properties of this substance have not been fully investigated. Chronic: No information found. Section 4 - FIRST AID MEASURES Eyes: Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid. Skin: Get medical aid. Immediately flush skin with plenty of water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse. Ingestion: If victim is conscious and alert, give 2-4 cupfuls of milk or water. Never give anything by mouth to an unconscious person. Get medical aid. Inhalation: Remove from exposure and move to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid. 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. Use water spray, dry chemical, carbon dioxide, or appropriate foam. Section 6 - ACCIDENTAL RELEASE MEASURES General Information: Use proper personal protective equipment as indicated in Section 8. Spills/Leaks: Vacuum or sweep up material and place into a suitable disposal container. Clean up spills immediately, observing precautions in the Protective Equipment section. Avoid generating dusty conditions. Provide ventilation. Section 7 - HANDLING and STORAGE Handling: Wash thoroughly after handling. Use with adequate ventilation. Minimize dust generation and accumulation. Avoid contact with eyes, skin, and clothing. Keep container tightly closed. Avoid ingestion and inhalation. Storage: Keep container closed when not in use. Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances. Section 8 - EXPOSURE CONTROLS, PERSONAL PROTECTION Engineering Controls: Use process enclosure, local exhaust ventilation, or other engineering controls to control airborne levels below recommended exposure limits. Facilities storing or utilizing this material should be equipped with an eyewash facility and a safety shower. Exposure Limits CAS# 7784-25-0: United Kingdom, WEL - TWA: (listed as aluminum, soluble salts): 2 mg/m3 TWA United Kingdom, WEL - STEL: (listed as aluminum, soluble salts): mg/m3 STEL Belgium - TWA: (listed as aluminum, soluble salts): 2 mg/m3 VLE ( Al) France - VME: (listed as aluminum, soluble salts): 2 mg/m3 VME Germany: (listed as aluminum, soluble salts): 2 mg/m3 VME Malaysia: (listed as aluminum, soluble salts): 2 mg/m3 TWA (as Al Spain: (listed as aluminum, soluble salts): 2 mg/m3 VLA-ED (as Al CAS# 7784-26-1: United Kingdom, WEL - TWA: (listed as aluminum, soluble salts): 2 mg/m3 TWA United Kingdom, WEL - STEL: (listed as aluminum, soluble salts): mg/m3 STEL Belgium - TWA: (listed as aluminum, soluble salts): 2 mg/m3 VLE ( Al) France - VME: (listed as aluminum, soluble salts): 2 mg/m3 VME Germany: (listed as aluminum, soluble salts): 2 mg/m3 VME Malaysia: (listed as aluminum, soluble salts): 2 mg/m3 TWA (as Al Spain: (listed as aluminum, soluble salts): 2 mg/m3 VLA-ED (as Al 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 prevent skin exposure. Respirators: A respiratory protection program that meets OSHA's 29 CFR 1910.134 and ANSI Z88.2 requirements or European Standard EN 149 must be followed whenever workplace conditions warrant respirator use. Section 9 - PHYSICAL AND CHEMICAL PROPERTIES Physical State: Crystals Color: white Odor: Odorless. pH: Not available. Vapor Pressure: Negligible. Viscosity: Not available. Boiling Point: 200 deg C @ 760mm Hg Freezing/Melting Point: 93.5 deg C Autoignition Temperature: Not available. Flash Point: Not applicable. Explosion Limits, lower: Not available. Explosion Limits, upper: Not available. Decomposition Temperature: >280 deg C Solubility in water: Soluble. Specific Gravity/Density: 1.6400g/cm3 Molecular Formula: AlNH4(SO4)2.12H2O Molecular Weight: 453.33 Section 10 - STABILITY AND REACTIVITY Chemical Stability: Stable. Conditions to Avoid: Dust generation. Incompatibilities with Other Materials: Strong oxidizing agents, strong bases, aluminum, copper, steel, zinc. Hazardous Decomposition Products: Nitrogen oxides, oxides of sulfur, ammonia and/or derivatives. Hazardous Polymerization: Will not occur. Section 11 - TOXICOLOGICAL INFORMATION RTECS#: CAS# 7784-25-0 unlisted. CAS# 7784-26-1: WS5640010 LD50/LC50: Not available. Not available. Carcinogenicity: Aluminum ammonium sulfate, anhydrous - Not listed by ACGIH, IARC, or NTP. Aluminum ammonium sulfate dodecahydrate - Not listed by ACGIH, IARC, or NTP. Other: See actual entry in RTECS for complete information. 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 Shipping Name: Not regulated. Hazard Class: UN Number: Packing Group: IMO Shipping Name: Not regulated. Hazard Class: UN Number: Packing Group: 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# 7784-25-0: No information available. CAS# 7784-26-1: 1 Canada CAS# 7784-25-0 is listed on Canada's DSL List. CAS# 7784-26-1 is listed on Canada's DSL List. CAS# 7784-25-0 is not listed on Canada's Ingredient Disclosure List. CAS# 7784-26-1 is not listed on Canada's Ingredient Disclosure List. US FEDERAL TSCA CAS# 7784-25-0 is listed on the TSCA inventory. CAS# 7784-26-1 is not on the TSCA Inventory because it is a hydrate. It is considered to be listed if the CAS number for the anhydrous form is on the inventory (40CFR720.3(u)(2)). SECTION 16 - ADDITIONAL INFORMATION N/A

安全

• 安全声明 (欧洲): S26-S36
• 危险品运输编码: UN2810
• 包装等级: III
• 危险类别: 6.1
• 海关编码: 2833309000

制备

1.在硫酸铝浓溶液中加硫酸铵溶液，加热溶解，过滤、浓缩、冷却晶析后分离而得。

2.间接法 用硫酸分解铝土矿。
将铝土矿加入分解槽中加硫酸分解，经静置，沉降，吸取清液精制后得纯度较高的硫酸铝溶液。将其密度调至（19℃）1.230～1.306。Al₂(SO₄)₃含量20%～26%后送入反应槽内，在加热下搅拌，以Al₂(SO₄)₃︰(NH₄)₂SO₄＝1︰0.42的摩尔比加入硫酸铵。在100℃下搅拌至硫酸铵全部溶解。然后，冷却，结晶，过滤，洗涤结晶，干燥得成品。

3.将铵明矾粉末放在铝板上，在炉中加热至200℃以除去结晶水而成。

4.直接合成法
将工业硫酸铵和硫酸铝溶解于100℃的水中，经过滤、冷却、结晶、分离、干燥即得产品。

5.将十二水硫酸铝铵NH4Al(SO4)2·12H2O加热逐步升温使其脱水，最后升温至200℃，并在此温度下保持一段时间，使其完全脱水成为无水盐。

6.矾土硫酸法　铝矾土与硫酸反应生成硫酸铝，用骨胶沉降后加入硫酸铵，再经浓缩、冷却结晶、分离洗涤，制备成品。反应式如下：

7.氢氧化铝法　氢氧化铝与硫酸反应后，加入硫酸铵，经浓缩、冷却结晶、离心脱水、干燥而得。反应式如下：

海关

海关编码	2833309000