二氟甲烷

二氟甲烷用途

【用途一】
用作干刻剂，低温制冷剂R-502的替代品，或者分别与HFC-134a、HFC-152a形成混合制冷剂替代HCFC-22
【用途二】
作制冷剂。

二氟甲烷名称

[ CAS 号 ]:
75-10-5

[ 中文名 ]:
二氟甲烷

[ 英文名 ]:
Difluoromethane

[英文别名 ]:

MFCD00039283
F32
EINECS 200-839-4
Methane, difluoro-
Freon 32
CH2F2
R 32
methylene difluoride
CFC32
HFC-32

二氟甲烷物理化学性质

[ 密度 ]:
0.9±0.1 g/cm3

[ 沸点 ]:
-62.2±8.0 °C at 760 mmHg

[ 熔点 ]:
−136 °C(lit.)

[ 分子式 ]:
CH₂F₂

[ 分子量 ]:
52.023

[ 闪点 ]:
-78.5±6.3 °C

[ 精确质量 ]:
52.012455

[ LogP ]:
0.30

[ 外观性状 ]:
无色气体

[ 蒸汽压 ]:
13163.8±0.1 mmHg at 25°C

[ 折射率 ]:
1.196

二氟甲烷毒性和生态

CHEMICAL IDENTIFICATION

RTECS NUMBER :: PA8537500

CHEMICAL NAME :: Methane, difluoro-

CAS REGISTRY NUMBER :: 75-10-5

LAST UPDATED :: 199806

DATA ITEMS CITED :: 5

MOLECULAR FORMULA :: C-H2-F2

MOLECULAR WEIGHT :: 52.03

HEALTH HAZARD DATA

ACUTE TOXICITY DATA

TYPE OF TEST :: LC - Lethal concentration

ROUTE OF EXPOSURE :: Inhalation

SPECIES OBSERVED :: Rodent - rat

DOSE/DURATION :: >52 pph/4H

TOXIC EFFECTS :: Brain and Coverings - recordings from specific areas of CNS

REFERENCE :: FAATDF Fundamental and Applied Toxicology. (Academic Press, Inc., 1 E. First St., Duluth, MN 55802) V.1- 1981- Volume(issue)/page/year: 31,243,1996

TYPE OF TEST :: LC50 - Lethal concentration, 50 percent kill

ROUTE OF EXPOSURE :: Inhalation

SPECIES OBSERVED :: Rodent - mouse

DOSE/DURATION :: 1810 gm/m3

TOXIC EFFECTS :: Behavioral - changes in motor activity (specific assay) Behavioral - ataxia Lungs, Thorax, or Respiration - respiratory depression

REFERENCE :: TOVEFN Toksikologicheskii Vestnik. (18-20 Vadkovskii per. Moscow, 101479, Russia) History Unknown Volume(issue)/page/year: (1),27,1996 ** REPRODUCTIVE DATA **

TYPE OF TEST :: TCLo - Lowest published toxic concentration

ROUTE OF EXPOSURE :: Inhalation

DOSE :: 50000 ppm/6H

SEX/DURATION :: female 6-15 ? after conception

TOXIC EFFECTS :: Reproductive - Effects on Embryo or Fetus - fetotoxicity (except death, e.g., stunted fetus)

REFERENCE :: FAATDF Fundamental and Applied Toxicology. (Academic Press, Inc., 1 E. First St., Duluth, MN 55802) V.1- 1981- Volume(issue)/page/year: 31,243,1996

二氟甲烷安全信息

[ 危害码 (欧洲) ]:
F:Flammable;

[ 风险声明 (欧洲) ]:
R11

[ 安全声明 (欧洲) ]:
S9-S16-S33

[ 危险品运输编码 ]:
UN 3252 2.1

[ WGK德国 ]:
1

[ RTECS号 ]:
PA8537500

[ 危险类别 ]:
2.1

[ 海关编码 ]:
2903399090

二氟甲烷合成路线

详细合成路线

二氟甲烷上下游产品

二氟甲烷上游产品

二氟甲烷下游产品

二氟甲烷制备

①天然气氟化，CH₄+2F₂→CH₂F₂+2HF。

②氟甲烷氟化CH₃F+F₂→CH₂F₂+HF。

二氟甲烷海关

[ 海关编码 ]: 2903399090

[ 中文概述 ]:
2903399090. 其他无环烃的氟化、溴化或碘化衍生物. 增值税率:17.0%. 退税率:13.0%. 监管条件:无. 最惠国关税:5.5%. 普通关税:30.0%

[ 申报要素 ]: 品名, 成分含量, 用途

[ Summary ]:
2903399090. brominated,fluorinated or iodinated derivatives of acyclic hydrocarbons. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:5.5%. General tariff:30.0%