magnesium fluosilicate * 6 H2O | 18972-56-0

• 物质功能分类: 无机化工 - 无机盐 - 金属卤化物及卤酸盐
• 分子结构分类: 无机化合物 - 混合金属/非金属化合物 - 碱土金属盐
• 英文名称: magnesium fluosilicate * 6 H2O
• 英文别名: Magnesium hexafluorosilicate hydrate；magnesium;hexafluorosilicon(2-);hydrate
• CAS: 18972-56-0
• 化学式: F₆Si*6H₂O*Mg
• 分子量: 274.473
• InChiKey: DKWXWEVHUQQHNV-UHFFFAOYSA-N

物化性质

• 熔点：
  120°C (dec.)
• 密度：
  1,79 g/cm3
• 暴露限值：
  ACGIH: TWA 2.5 mg/m3NIOSH: IDLH 250 mg/m3
• 稳定性/保质期：
  1. 常温常压下稳定。 2. 避免与水分、潮湿和酸接触。

计算性质

• 辛醇/水分配系数(LogP)：
  None
• 重原子数：
  9
• 可旋转键数：
  0
• 环数：
  None
• sp3杂化的碳原子比例：
  None
• 拓扑面积：
  1
• 氢给体数：
  1
• 氢受体数：
  8

安全信息

• TSCA：
  Yes
• 危险等级：
  6.1
• 安全说明：
  S24/25,S45
• 危险类别码：
  R25
• 海关编码：
  28269080
• 危险品运输编号：
  2853
• 包装等级：
  III
• 危险类别：
  6.1
• 储存条件：
  请将产品存放在常温下，密闭避光，保持通风和干燥。

SDS

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Section 1: Product Identification
Chemical Name: Magnesium hexafluorosilicate hexahydrate, 98%
CAS Registry Number: 18972-56-0
Formula: MgSiF6.6H2O
EINECS Number: none
Chemical Family: halometallate salts
Synonym: Magnesium fluorosilicate, Magnesium silicofluoride

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Section 2: Composition and Information on Ingredients
Ingredient CAS Number Percent ACGIH (TWA) OSHA (PEL)
Title compound 18972-56-0 100% 2.5mg/m3 (as F) 2.5mg/m3 (as F)

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Section 3: Hazards Identification
Irritating to eyes, skin, and respiratory tract. Harmful if swallowed. If inhaled or swallowed, this compound may,
Emergency Overview: to the extent that it may form water soluble fluoride, cause fluoride poisoning. Early symptoms include nausea,
vomiting, diarrhea, and weakness
Primary Routes of Exposure: Contact with skin and eyes. Inhalation of dust.
Eye Contact: Causes irritation and may cause serious eye damage. Effects may not immediately appear.
Causes irritation, with redness and pain. Soluble fluoride may be corrosive. Effects may not appear
Skin Contact:
immediately
Inhalation of dust causes severe irritation to the respiratory tract, causing coughing, sore throat, and labored
Inhalation:
breathing.
Ingestion: Harmful if swallowed. May cause salivation, nausea, vomiting, diarrhea, and abdominal pain.
Irritating to eys, skin and respiratory tract. Dust: Fluoride poisoning may cause nausea, vomiting, diarrhea,
Acute Health Affects:
weakness, coma, respiratory failure and cardiovascular collapse.
Chronic Health Affects: Prolonged exposure to hydrolysable fluorine compounds can cause deterioration of bone and tooth structure.
NTP: No
IARC: No
OSHA: No

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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 immediately with water. Remove contaminated clothing if necessary. Seek medical
Skin Exposure:
assistance if 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.

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SECTION 5: Fire Fighting Measures
Flash Point: not applicable
Autoignition Temperature: none
Explosion Limits: none
Extinguishing Medium: None. Material is non-flammable.
If this product is involved in a fire, fire fighters should be equipped with a NIOSH approved positive pressure
Special Fire Fighting Procedures:
self- contained breathing apparatus and full protective clothing.
Hazardous Combustion and If involved in a fire this material may emit corrosive fumes of hydrofluoric acid.
Decomposion Products:
Unusual Fire or Explosion Hazards: No unusual fire or explosion hazards.

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SECTION 6: Accidental Release Measures
Small spills can be mixed with powdered sodium bicarbonate, lime, or calcium carbonate and swept up. Avoid
Spill and Leak Procedures: raising dust. Spillage in areas not adequately ventilated may require an evacuation of area. Emergency
response teams will require self-contained breathing apparatus.

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SECTION 7: Handling and Storage
Handling and Storage: Store in a tightly sealed non-glass container away from moisture.

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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: Solid may form a toxic fine dust. If possible, handle the solid in an efficient fume hood.
If in form of fine dust and ventilation is not available a respirator should be worn. The use of respirators
Respirator:
requires a Respirator Protection Program to be in compliance with 29 CFR 1910.134.
Ventilation: Solid may form a toxic fine dust. If possible, handle the solid in an efficient fume hood.
Additional Protection: No additional protection required.

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SECTION 9: Physical and Chemical Properties
Color and Form: white pwdr.
Molecular Weight: 166.39 (274.48)
Melting Point: no data
Boiling Point: no data
Vapor Pressure: no data
Specific Gravity: 1.788
Odor: none
Solubility in Water: soluble

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SECTION 10: Stability and Reactivity
Stability: air and moisture stable
Hazardous Polymerization: no hazardous polymerization
Conditions to Avoid: none
Incompatibility: active metals
Decomposition Products: hydrogen fluoride, magnesium fluoride and silicon fluorides

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SECTION 11: Toxicological Information
RTECS Data: Oral (guinea pig); LD50:200 mg/kg. Subcutaneous (frog); LDLo:420 mg/kg.
Carcinogenic Effects: no data
Mutagenic Effects: no data
Tetratogenic Effects: no data

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SECTION 12: Ecological Information
Ecological Information: No information available

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SECTION 13: Disposal Considerations
Disposal: Dispose of according to local, state and federal regulations.

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SECTION 14: Transportation
Shipping Name (CFR): Magnesium fluorosilicate
Hazard Class (CFR): 6.1
Additional Hazard Class (CFR): NA
Packaging Group (CFR): III
UN ID Number (CFR): UN# 2853
Shipping Name (IATA): Magnesium fluorosilicate
Hazard Class (IATA): 6.1
Additional Hazard Class (IATA): NA
Packaging Group (IATA): III
UN ID Number (IATA): UN# 2853

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SECTION 15: Regulatory Information
TSCA: Listed in the TSCA inventory.
SARA (Title 313): Title compound not listed.
Second Ingredient: none

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SECTION 16 - ADDITIONAL INFORMATION
N/A

制备方法与用途

化学性质
本品为无色或白色菱状或针状结晶。相对密度1.788，于80℃脱水，100℃分解。易溶于水，溶于稀酸，难溶于氢氟酸，不溶于醇。其水溶液呈酸性反应，与碱作用时可生成相应的氟化物及二氧化硅。不易潮解。风化后失水成无水物。

用途
作皮革储存中的防虫剂，并具有防水作用。此外，用作混凝土的硬化剂和防水剂，适用于硅石建筑物表面处理及制造陶瓷。

生产方法
将1809公斤萤石粉、335公斤硅砂和1858公斤硫酸依次投入反应转炉中，制备氟硅酸，然后通过吸收塔吸收得含量为20～22°Bé的氟硅酸溶液。除去硫酸盐后将其打入中和釜，加入菱苦粉悬浮液中和至pH值为3～4。过滤后将滤液打入蒸发器浓缩，再打入结晶器冷却结晶。干燥后得到产品。

类别
有毒物品

毒性分级
高毒

急性毒性
口服-豚鼠LD50：200毫克/公斤

可燃性危险特性
不可燃烧；火场释放有毒氟化物和氧化镁、氧化硅烟雾；与酸反应产生有毒氟化氢气体

储运特性
库房应通风低温干燥，须与食品及酸类分开储存运输

灭火剂
大量水

职业标准
TWA 2.5毫克/立方米（氟）

反应信息

• 作为反应物：
  描述：

  magnesium fluosilicate * 6 H2O 在 水 作用下， 以 水 为溶剂， 生成 magnesium hydroxide
  参考文献：
  名称：

  Shtolba, F., 1877, p. 289 - 289

  摘要：

  DOI：
• 作为产物：
  描述：

  六氟合硅酸 、 magnesium chloride 以 not given 为溶剂， 生成 magnesium fluosilicate * 6 H2O
  参考文献：
  名称：

  Pince pour pièces à usiner

  摘要：

  这个夹具用于加工零件，根据Z轴固定。它内部有两个锥形表面（2），一个是雄性的，一个是雌性的。通过使用雄性或雌性锥形（3），将其推向夹具的任一锥形表面（2），可以使夹具的支架（1）相互分开或靠近。因此，夹紧可以从内向外或从外向内进行。夹具是由软钢制成的，这使得可以轻松地形成支架的末端，以使其具有要加工零件的形状。由于夹具是固定的，因此零点的精度是完全的。

  公开号：

  EP0263780A1

文献信息

• Shtolba, F., 1877, p. 288 - 288
  作者：Shtolba, F.

  DOI：——

  日期：——
• Shtolba, F., 1877, p. 290 - 290
  作者：Shtolba, F.

  DOI：——

  日期：——
• Gmelin Handbuch der Anorganischen Chemie, Gmelin Handbook: Mg: MVol.B3, 33, page 391 - 392
  作者：

  DOI：——

  日期：——
• Gruner, E.; Werther, U., Angewandte Chemie, 1929, vol. 42, p. 1135 - 1135
  作者：Gruner, E.、Werther, U.

  DOI：——

  日期：——
• Honigmann, L., Glastechnische Berichte, <hi>1932</hi>, vol. 10, p. 171 - 171
  作者：Honigmann, L.

  DOI：——

  日期：——