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硅酸

硅酸用途

用于油脂和蜡的脱色。制造催化剂及催化剂载体。用作化学试剂和钨丝加工中的熔剂。

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硅酸名称

[ CAS 号 ]:
1343-98-2

[ 中文名 ]:
硅酸

[ 英文名 ]:
silicic acid

[中文别名 ]:

[英文别名 ]:

MFCD00054122
Silicic acid
EINECS 215-683-2

硅酸物理化学性质

[ 密度 ]:
0.230 g/cm3

[ 分子式 ]:
H₂O₃Si

[ 分子量 ]:
78.09960

[ 精确质量 ]:
77.97730

[ PSA ]:
57.53000

[ 外观性状 ]:
无色至白色固体

[ 储存条件 ]:
室温

[ 稳定性 ]:
Stable.

[ 水溶解性 ]:
Soluble in water

硅酸MSDS

详细MSDS(安全技术说明书)

硅酸毒性和生态

CHEMICAL IDENTIFICATION

RTECS NUMBER :: VV8853000

CHEMICAL NAME :: Silicic acid (polyortho)

CAS REGISTRY NUMBER :: 1343-98-2

LAST UPDATED :: 199710

HEALTH HAZARD DATA

ACUTE TOXICITY DATA

TYPE OF TEST :: TCLo - Lowest published toxic concentration

ROUTE OF EXPOSURE :: Inhalation

SPECIES OBSERVED :: Rodent - rat

DOSE/DURATION :: 680 mg/m3/6H/2W-I

TOXIC EFFECTS :: Lungs, Thorax, or Respiration - fibrosis, focal (pneumoconiosis) Lungs, Thorax, or Respiration - changes in lung weight Related to Chronic Data - death

REFERENCE :: FCTOD7 Food and Chemical Toxicology. (Pergamon Press Inc., Maxwell House, Fairview Park, Elmsford, NY 10523) V.20- 1982- Volume(issue)/page/year: 29,341,1991

TYPE OF TEST :: TCLo - Lowest published toxic concentration

ROUTE OF EXPOSURE :: Inhalation

SPECIES OBSERVED :: Rodent - rat

DOSE/DURATION :: 35 mg/m3/6H/13W-I

TOXIC EFFECTS :: Lungs, Thorax, or Respiration - other changes Lungs, Thorax, or Respiration - changes in lung weight Nutritional and Gross Metabolic - weight loss or decreased weight gain

REFERENCE :: FCTOD7 Food and Chemical Toxicology. (Pergamon Press Inc., Maxwell House, Fairview Park, Elmsford, NY 10523) V.20- 1982- Volume(issue)/page/year: 29,341,1991 *** NIOSH STANDARDS DEVELOPMENT AND SURVEILLANCE DATA *** NIOSH OCCUPATIONAL EXPOSURE SURVEY DATA : NOHS - National Occupational Hazard Survey (1974) NOHS Hazard Code - 80288 No. of Facilities: 478 (estimated) No. of Industries: 20 No. of Occupations: 16 No. of Employees: 3828 (estimated) NOES - National Occupational Exposure Survey (1983) NOES Hazard Code - 80288 No. of Facilities: 6758 (estimated) No. of Industries: 58 No. of Occupations: 70 No. of Employees: 111636 (estimated) No. of Female Employees: 28296 (estimated)

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硅酸安全信息

[ 危害码 (欧洲) ]:
Xi: Irritant;

[ 风险声明 (欧洲) ]:
R36/37

[ 安全声明 (欧洲) ]:
S22-S26-S36-S24/25

[ WGK德国 ]:
3

[ RTECS号 ]:
VV8853000

[ 海关编码 ]:
2842909090

硅酸制备

1.盐酸法将细孔球形硅胶用盐酸浸泡4～6h后用纯水洗涤，烘干72h以上，用纯水洗涤后，再在70～80℃二次烘干，制得硅酸

2.在硅酸钠溶液中加入酸与电解质，搅拌下反应生成硅酸凝胶，再经老化、洗涤、干燥、活化制得硅胶。不同的原料配比及工艺条件可制得不同规格的产品。

3. 在硅酸钠溶液中加入酸及一定量电解质，在搅拌下反应生成硅酸凝胶，再经老化、洗涤干燥活化制得硅胶。采用不同原料配比及工艺条件可制得不同规格的产品。

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硅酸海关

[ 海关编码 ]: 2842909090

硅酸

硅酸用途

硅酸名称

硅酸物理化学性质

硅酸MSDS

详细MSDS(安全技术说明书)

硅酸毒性和生态

CHEMICAL IDENTIFICATION

HEALTH HAZARD DATA

ACUTE TOXICITY DATA

硅酸安全信息

硅酸制备

硅酸海关

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