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碲酸

碲酸用途

用作分析试剂，定量分析中分离溴化物及氯化物。

碲酸名称

[ CAS 号 ]:
7803-68-1

[ 中文名 ]:
碲酸

[ 英文名 ]:
Hexahydroxy-λ6-tellane

[英文别名 ]:

Telluric acid (H6TeO6)
Hexahydroxy-λ-tellane
Telluric(VI) acid
EINECS 232-267-6
Orthotelluric acid
Orthotellursaeure
hexahydroxidotellurium
Tellurium hydroxide
Tellurium, hexahydroxy-
tellursaeure

碲酸物理化学性质

[ 密度 ]:
3.068; d 3.163

[ 沸点 ]:
0℃

[ 熔点 ]:
136°C

[ 分子式 ]:
H₆O₆Te

[ 分子量 ]:
229.644

[ 精确质量 ]:
231.922668

[ PSA ]:
121.38000

[ 外观性状 ]:
white monoclinic crystals

[ 储存条件 ]:
室温，避光

[ 水溶解性 ]:
H2O: 0.1 g/mL, clear, colorless

碲酸MSDS

碲酸毒性和生态

CHEMICAL IDENTIFICATION

RTECS NUMBER :: WY2350000

CHEMICAL NAME :: Telluric acid

CAS REGISTRY NUMBER :: 7803-68-1

LAST UPDATED :: 199712

DATA ITEMS CITED :: 23

MOLECULAR FORMULA :: H6-O6-Te

MOLECULAR WEIGHT :: 229.66

WISWESSER LINE NOTATION :: H6 TE-O6

HEALTH HAZARD DATA

ACUTE TOXICITY DATA

TYPE OF TEST :: LDLo - Lowest published lethal dose

ROUTE OF EXPOSURE :: Intravenous

SPECIES OBSERVED :: Rodent - rat

DOSE/DURATION :: 31 mg/kg

TOXIC EFFECTS :: Details of toxic effects not reported other than lethal dose value

REFERENCE :: JPETAB Journal of Pharmacology and Experimental Therapeutics. (Williams & Wilkins Co., 428 E. Preston St., Baltimore, MD 21202) V.1- 1909/10- Volume(issue)/page/year: 33,270,1928

TYPE OF TEST :: LDLo - Lowest published lethal dose

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Rodent - rabbit

DOSE/DURATION :: 56 mg/kg

TOXIC EFFECTS :: Details of toxic effects not reported other than lethal dose value

REFERENCE :: JPETAB Journal of Pharmacology and Experimental Therapeutics. (Williams & Wilkins Co., 428 E. Preston St., Baltimore, MD 21202) V.1- 1909/10- Volume(issue)/page/year: 33,270,1928

TYPE OF TEST :: LDLo - Lowest published lethal dose

ROUTE OF EXPOSURE :: Intravenous

SPECIES OBSERVED :: Rodent - rabbit

DOSE/DURATION :: 5600 ug/kg

TOXIC EFFECTS :: Details of toxic effects not reported other than lethal dose value

REFERENCE :: JPETAB Journal of Pharmacology and Experimental Therapeutics. (Williams & Wilkins Co., 428 E. Preston St., Baltimore, MD 21202) V.1- 1909/10- Volume(issue)/page/year: 33,270,1928 *** REVIEWS *** ACGIH TLV-TWA 0.1 mg(Te)/m3 DTLVS* The Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) booklet issues by American Conference of Governmental Industrial Hygienists (ACGIH), Cincinnati, OH, 1996 Volume(issue)/page/year: TLV/BEI,1997 *** U.S. STANDARDS AND REGULATIONS *** OSHA PEL (Gen Indu):8H TWA 0.1 mg(Te)/m3 CFRGBR Code of Federal Regulations. (U.S. Government Printing Office, Supt. of Documents, Washington, DC 20402) Volume(issue)/page/year: 29,1910.1000,1994 OSHA PEL (Construc):8H TWA 0.1 mg(Te)/m3 CFRGBR Code of Federal Regulations. (U.S. Government Printing Office, Supt. of Documents, Washington, DC 20402) Volume(issue)/page/year: 29,1926.55,1994 OSHA PEL (Shipyard):8H TWA 0.1 mg(Te)/m3 CFRGBR Code of Federal Regulations. (U.S. Government Printing Office, Supt. of Documents, Washington, DC 20402) Volume(issue)/page/year: 29,1915.1000,1993 OSHA PEL (Fed Cont):8H TWA 0.1 mg(Te)/m3 CFRGBR Code of Federal Regulations. (U.S. Government Printing Office, Supt. of Documents, Washington, DC 20402) Volume(issue)/page/year: 41,50-204.50,1994 *** OCCUPATIONAL EXPOSURE LIMITS *** OEL-AUSTRALIA:TWA 0.1 mg(Te)/m3 JAN 1993 OEL-BELGIUM:TWA 0.1 mg(Te)/m3 JAN 1993 OEL-DENMARK:TWA 0.1 mg(Te)/m3 JAN 1993 OEL-FINLAND:TWA 0.1 mg(Te)/m3;STEL 0.3 mg(Te)/m3 JAN 1993 OEL-FRANCE:TWA 0.1 mg(Te)/m3 JAN 1993 OEL-GERMANY:TWA 0.1 mg(Te)/m3 JAN 1993 OEL-THE NETHERLANDS:TWA 0.1 mg(Te)/m3 JAN 1993 OEL-THE PHILIPPINES:TWA 0.1 mg(Te)/m3 JAN 1993 OEL-SWEDEN:TWA 0.1 mg(Te)/m3 JAN 1993 OEL-SWITZERLAND:TWA 0.1 mg(Te)/m3;STEL 0.5 mg(Te)/m3 JAN 1993 OEL-TURKEY:TWA 0.1 mg(Te)/m3 JAN 1993 OEL-UNITED KINGDOM:TWA 0.1 mg(Te)/m3 JAN 1993 OEL IN BULGARIA, COLOMBIA, JORDAN, KOREA check ACGIH TLV OEL IN NEW ZEALAND, SINGAPORE, VIETNAM check ACGIH TLV

碲酸安全信息

[ 符号 ]:

GHS07

[ 信号词 ]:
Warning

[ 危害声明 ]:
H332

[ 个人防护装备 ]:
dust mask type N95 (US);Eyeshields;Gloves

[ 危害码 (欧洲) ]:
Xn

[ 风险声明 (欧洲) ]:
20

[ 安全声明 (欧洲) ]:
S22;S38;S36/S37/S39

[ 危险品运输编码 ]:
UN 3284 6.1/PG 3

[ WGK德国 ]:
3

[ RTECS号 ]:
WY2350000

[ 包装等级 ]:
II

[ 危险类别 ]:
6.1(a)

碲酸合成路线

碲酸上下游产品

碲酸上游产品

碲酸下游产品

碲酸制备

1.将理论量的无水碳酸钾（纯级）、水和少量30%的过氧化氢（纯级）加到研细的试剂二氧化碲中，不断搅拌并加热至105-110 ºC，保温30min，

当气泡不再溢出时，冷却混合物，滤去不溶物，滤液用水稀释，然后分次少量加入KY-2（H-型）阳离子交换树脂。控制混合物的PH<3，滤出树脂并应水洗涤树脂数次，洗液并入滤液，将该溶液以一定速度通过填有KY-2（H-型）洗涤交换柱，合并洗液及溶液，加热蒸发至出现结晶薄膜，冷却，加入溶液体积两倍的95%乙醇，静置后过滤，结晶用95%乙醇洗涤后，于真空下干燥，即为成品。

2.将13g碲粉装入带在回流冷凝管的圆底烧瓶中，用5mL 50%的硝酸将其完全湿透。将反应装置置于通风橱中，分次加入150mL 10%的氯酸溶液，可加热使反应激烈发生，此时溶液应处于沸腾状态，并有大量氯气生成，加热回流30min，使碲完全溶解。先用直火加热蒸发溶液，然后在水浴上蒸发至有结晶出现，在搅拌下用冰水浴冷却结晶，即可析出微细的白色结晶。将结晶滤出后用热水溶解并重结晶一次。用玻璃砂芯漏斗吸滤，先用少量的冰水，后用乙醇和乙醚洗涤，最后在放有P2O5的真空干燥器干燥。

3.将10g TeO2在40mL浓硝酸和100mL水中的悬浮液加热至沸，并在猛烈搅拌下分次慢慢加入100mL 5%的高锰酸钾溶液，每隔5min加入5mL，然后搅拌和煮沸。当全部高锰酸钾溶液加完后，使溶液在沸腾温度下保持50min，这样可减少MnO2生成的量。然后慢慢地加入3%的H2O2溶液，直至MnO2全部溶解，成为澄清的溶液。将此溶液蒸发到约剩60g时加入10mL浓硝酸，静置24h可析出原碲酸结晶。将母液倾出，蒸发至约25g时再用10mL浓硝酸进行同样的处理，又可得到部分结晶。将两次所得的结晶合并后用浓硝酸洗涤三次，每次用10mL硝酸，且每次洗涤后要尽量将晶体弄干。然后将晶体用25mL水和17mL浓硝酸组成的溶液重结晶一次，再用蒸馏水重结晶一次。最后将结晶用少量冰水、乙醇和乙醚依次洗涤，并在放有P2O5的真空干燥器中干燥。

碲酸文献

Wiberg E and Wiberg N

Inorg. Chem.

更多文献

碲酸