硅钨酸

  • 基本信息
  • 制备方法及用途
  • 物化性质
  • 安全信息
  • 毒理性
  • MSDS
  • 结构与计算化学

硅钨酸 基本信息

中文名称:
硅钨酸 
中文别名:
硅钨酸,二十六水;
硅钨酸 
英文名称:
tetrahydrogen
英文别名:
Silicotungstic Acid Hydrate;
Silicotungstic acid;
SILICOTUNGSTIC ACID HYDRATE 
CAS No.:
12027-38-2
分 子 式:

H4O40SiW12

分 子 量:
2878.17
精确分子量:
2897.23000
PSA:
610.59000
MDL:
MFCD00150392
EINECS:
234-719-8
InChI:
The Key: GNGDDIKLULTLEC-UHFFFAOYSA-O
危险品标志:

 IrritantXi

风险术语:

 R36/37/38

安全术语:

 S26;S36

分子结构式:
SDS:
查看

硅钨酸 制备方法及用途

制备方法

将1000g水合的钨酸钠溶解在2000mL水中。向这个溶液中加入75g水玻璃溶液(比重1.375)。用马达搅拌器猛烈地搅拌溶液并加热至沸腾,同时用分液漏斗向溶液中逐滴地加入600mL浓盐酸(比重1.18)。这个操作约用90min。将产生的少量硅酸沉淀滤出,并令混合物冷却。再加入另外400mL浓盐酸,并再使溶液冷却。用略过量的乙醚萃取,所用的乙醚已预先用稀氢氧化钠溶液洗涤过 。将乙醚复合物放入一只抽滤瓶中,在此混合物中抽入洗过的空气来迅速地将乙醚吹除,在此同时将混合物放在热水锅上加热。继续这个操作直到液面的边缘上有晶体出现。然后将溶液放置使之进行缓慢地结晶,或将溶液蒸发干。将复合物再溶解在水中并再蒸发干。继续重复这个操作直到产物不再有挥发酸的气味。当已充分干燥时,在研缽中将酸磨细,并在70℃干燥至恒重。这个产物约含7个分子结晶水。它稳定并不潮解。

用途简介

制成重液,用以浮选矿物。生物碱的沉淀和测定。碱性苯胺燃料媒染剂。

用途

制成重液,用以浮选矿物。生物碱的沉淀和测定。碱性苯胺燃料媒染剂。

硅钨酸 物化性质

沸点:
100ºC at 760 mmHg
存储条件/存储方法:

常温密闭,阴凉通风干燥处

稳定性相关:

常温常压下稳定

避免光,明火,高温

其它信息:

1.       性状:白色或浅黄色的结晶。

2.       密度(g/mL,25):未确定

3.       相对蒸汽密度(g/mL,空气=1):未确定

4.       熔点(ºC):未确定

5.       沸点(ºC,常压):未确定

6.       沸点(ºC1mmHg):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(20ºC):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.    溶解性溶于水、乙醇和乙醚。

硅钨酸 安全信息

危险类别码:
36/37/38
安全说明:
26-36
安全标志:
S26:万一接触眼睛,立即使用大量清水冲洗并送医诊治。
危险标志:
Xi: Irritant;

硅钨酸 毒理性

毒理学数据:

有刺激性

生态数据:

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。

硅钨酸 MSDS

Name: Dodeca-tungstosilicic Acid Material Safety Data Sheet
Synonym:
CAS: 12027-38-2
Section 1 - Chemical Product   MSDS Name:Dodeca-tungstosilicic Acid Material Safety Data Sheet
Synonym:

Section 2 - COMPOSITION, INFORMATION ON INGREDIENTS
CAS# Chemical Name content EINECS#
12027-38-2 Dodeca-tungstosilicic Acid 234-719-8
Hazard Symbols: None Listed.
Risk Phrases: None Listed.

Section 3 - HAZARDS IDENTIFICATION
  EMERGENCY OVERVIEW
Corrosive.
Potential Health Effects
Eye:
Causes eye burns.
Skin:
Causes skin irritation. Causes skin burns.
Ingestion:
Causes gastrointestinal irritation with nausea, vomiting and diarrhea. Causes gastrointestinal tract burns.
Inhalation:
Causes respiratory tract irritation.
Chronic:
Not available.

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:
Get medical aid immediately. Flush skin with plenty of water for at least 15 minutes while removing contaminated clothing and shoes.
Ingestion:
Do not induce vomiting. 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 immediately.
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 if cough or other symptoms appear.
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.
Extinguishing Media:
In case of fire, use water, dry chemical, chemical foam, or alcohol-resistant foam.

Section 6 - ACCIDENTAL RELEASE MEASURES
  General Information: Use proper personal protective equipment as indicated in Section 8.
Spills/Leaks:
Sweep up or absorb material, then place into a suitable clean, dry, closed container for disposal.

Section 7 - HANDLING and STORAGE
  Handling:
Wash thoroughly after handling. Use with adequate ventilation. Avoid contact with eyes, skin, and clothing. Avoid ingestion and inhalation.
Storage:
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 adequate ventilation to keep airborne concentrations low.
Exposure Limits CAS# 12027-38-2: 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: white to pale yellow
Odor: Not available.
pH: Not available.
Vapor Pressure: Not available.
Viscosity: Not available.
Boiling Point: Not available.
Freezing/Melting Point: Not available.
Autoignition Temperature: Not available.
Flash Point: Not available.
Explosion Limits, lower: Not available.
Explosion Limits, upper: Not available.
Decomposition Temperature:
Solubility in water: Very soluble in water
Specific Gravity/Density: Not available.
Molecular Formula: Not applicable.
Molecular Weight:

Section 10 - STABILITY AND REACTIVITY
  Chemical Stability:
Stable under normal temperatures and pressures.
Conditions to Avoid:
Incompatible materials.
Incompatibilities with Other Materials:
Oxidizer materials Hazardous Decomposition Products:
Carbon monoxide, carbon dioxide.
Hazardous Polymerization: Will not occur.

Section 11 - TOXICOLOGICAL INFORMATION
  RTECS#:
CAS# 12027-38-2 unlisted.
LD50/LC50:
Not available.
Carcinogenicity:
Dodeca-tungstosilicic Acid - Not listed by ACGIH, IARC, or NTP.

Section 12 - ECOLOGICAL INFORMATION
 

Section 13 - DISPOSAL CONSIDERATIONS
  Products which are considered hazardous for supply are classified as Special Waste and the disposal of such chemicals is covered by regulations which may vary according to location. Contact a specialist disposal company or the local waste regulator for advice. Empty containers must be decontaminated before returning for recycling.

Section 14 - TRANSPORT INFORMATION
 
IATA
Not regulated as a hazardous material.
IMO
Not regulated as a hazardous material.
RID/ADR
Not regulated as a hazardous material.

Section 15 - REGULATORY INFORMATION
 
European/International Regulations
European Labeling in Accordance with EC Directives
Hazard Symbols: Not available.
Risk Phrases:
Safety Phrases:
WGK (Water Danger/Protection)
CAS# 12027-38-2: No information available.
Canada
CAS# 12027-38-2 is listed on Canada's DSL List.
CAS# 12027-38-2 is not listed on Canada's Ingredient Disclosure List.
US FEDERAL
TSCA
CAS# 12027-38-2 is listed on the TSCA inventory.


SECTION 16 - ADDITIONAL INFORMATION
N/A

硅钨酸 分子结构与计算化学数据

计算化学数据

1、   氢键供体数量:40

2、   氢键受体数量:40

3、   可旋转化学键数量:0

4、   拓扑分子极性表面积(TPSA):40

5、   重原子数量:53

6、   表面电荷:0

7、   复杂度:0

8、   同位素原子数量:0

9、   确定原子立构中心数量: 0

10、   不确定原子立构中心数量:0

11、   确定化学键立构中心数量:0

12、   不确定化学键立构中心数量:0

13、   共价键单元数量:53

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