CAS: 9006-04-6; Rubber Latex

• 英文名称Rubber Latex
• 中文名称天然橡胶
• IUPAC名称2-methylbuta-1,3-diene
• 其它别名RUBBER LATEX; RUBBERFUME
• CAS编号9006-04-6
• EINECS号:232-689-0
• 分子式:C5H8
• 分子量:68.11702
• 产品CID: 2444086
• 产品分类Carcinogens | Flammable agents - 4th degree | Reactive agents - 2nd degree

• 相似结构搜索
• InChIKey: RRHGJUQNOFWUDK-UHFFFAOYSA-N
• InChI=1S/C5H8/c1-4-5(2)3/h4H,1-2H2,3H3…
• 计算化学: 氢键受体数*氢键供体数*可旋转键数*

物理性质

• 熔点-184 °F (NTP, 1992) | -145.95 °C | The generally accepted crystal melting temperature of natural rubber is 30 °C. | -146 °C | -146.7 °C
• 沸点93 °F at 760 mmHg (NTP, 1992) | 34.067 °C | 34 °C | 34 °C @760 [mm Hg]
• 闪点-65 °F (NTP, 1992) | -65 °F (-54 °C) (Closed cup)
• 密度0.906-0.916 g/cm3
• 蒸汽压400 mmHg at 59.7 °F ; 493 mmHg at 68 °F (NTP, 1992) | 550.0 [mmHg] | VP: 400 mm Hg at 15.4 °C | 550 mm Hg at 25 °C | Vapor pressure, kPa at 20 °C: 53.2 | 400 [mm Hg] @550 °C
• 溶解性less than 1 mg/mL at 70.7 °F (NTP, 1992) | In water, 642 mg/L at 25 °C | Practically insoluble in water | Miscible with ethanol, ethyl ether, acetone, benzene | Soluble in alcohol, ether, hydrocarbon solvents | Natural rubber is soluble in most aliphatic, aromatic, and chlorinated solvents, but its high molecular weight makes it difficult to dissolve. | Practically insol in water, alcohol, dil acids, or alkali; sol in abs ether, chloroform, most fixed or volatile oils, petroleum ether, carbon disulfide, oil of turpentine. | Raw rubber dissolves (or at least swells very strongly) in many organic liquids such as benzene, petroleum ether, crude petroleum, and carbon tetrachloride. In contrast, vulcanized rubber can only swell because the chemical cross-liking prevents dissolution. | Solubility in water, mg/l at 25 °C: 642 (very poor)
• 敏感性ISOPRENE may react vigorously with strong oxidizing agents. May react exothemically with reducing agents to release hydrogen gas. May undergo exothermic addition polymerization in the presence of various catalysts (such as acids) or initiators. Undergoes autoxidation upon exposure to the air to form explosive peroxides. Mixing isoprene in equal molar portions with any of the following substances in a closed container caused the temperature and pressure to increase: chlorosulfonic acid, nitric acid (70%), oleum, sulfuric acid (90%) [NFPA 1991].
• 外观形态乳状液体；固体

MSDS等安全信息

• GHS符号GHS08
• 危险类别Vapor produces no effects other than slight irritation of the eyes and upper respiratory tract. Liquid may irritate eyes; like gasoline. (USCG, 1999) | · May cause toxic effects if inhaled or absorbed through skin. | · Inhalation or contact with material may irritate or burn skin and eyes. | · Fire will produce irritating, corrosive and/or toxic gases. | · Vapors may cause dizziness or asphyxiation, especially when in closed or confined areas. | · Runoff from fire control or dilution water may cause environmental contamination.
• 警示词Danger
• 危险描述H317-H334
• 防范说明P261-P272-P280-P302+P352-P333+P313-P321-P363-P501-P261-P285-P304+P341-P342+P311-P501
• 安全声明IDENTIFICATION AND USE: Isoprene is a colorless volatile liquid. It is used in manufacturing butyl rubber, and as copolymer in the production of synthetic elastomers. HUMAN STUDIES: Respiratory irritation is a potential symptom of overexposure. Isoprene may act as a CNS depressant and asphyxiant at high concentrations. Catarrhal inflammation, subtrophic and atrophic processes in the upper respiratory tract, and deterioration of olfaction were noted in isoprene rubber production workers. Prevalence and degree were correlated with increasing length of service. In the comet assay isoprene induced DNA damage in peripheral blood mononuclear cells in the presence of metabolic activation. ANIMAL STUDIES: Exposure of rats of each sex to 0, 438, 875, 1750, 3500 or 7000 ppm isoprene vapors by inhalation for 6 hr a day on 5 days/wk for 2 wk had no effect. In male mice it reduced body weight gain, produced atrophy of the thymus and testis (at 7000 ppm only), olfactory epithelial degeneration, vacuolized liver cytoplasm and forestomach epithelial hyperplasia. In both male and female mice in all exposure groups, there were reductions in erythrocyte numbers, hemoglobin concentration and volume of packed erythrocytes. An exposure-related increased incidence of liver, lung, Harderian gland and forestomach tumors and hemangiosarcomas and histiocytic sarcomas was reported in mice. In rats, exposed males and females had increased incidences of mammary fibroadenomas. The incidence of renal tubule adenomas was increased in treated males. Some animals also had a renal carcinoma. Treated males also had increased incidence of interstitial-cell adenomas of the testis. Isoprene affected ovarian follicles in 21 day old female mice. In male mice, there was reduction of testicular weight by 35% in the animals exposed to 7000 ppm, seminiferous tubular atrophy in 20% of animals studied, reduced epididymal weights, lower spermatid headcounts and concentrations, and reduced sperm motility in the 700 and 7000 ppm groups. In developmental studies, there was no treatment-related effect on the incidence of fetal malformations or variations other than a slight increase in the incidence of reduced vertebral ossification. Isoprene was negative when tested for mutagenicity in the Salmonella/microsome preincubation assay using 5 S. typhimurium strains (TA1535, TA1537, TA97, TA98, & TA100) with and without metabolic activation. Isoprene did not induce either sister chromatid exchanges or chromosomal aberrations in cultures of Chinese hamster ovary cells.
• 危险类别码An irritant to the skin, eyes, and mucous membranes; Causes CNS depression at high concentrations; [HSDB] If left on clothes, may cause reddening of skin; [CHRIS] Can affect the CNS, resulting in respiratory depression; [ICSC] Human volunteers complain of slight upper respiratory tract irritation when exposed to 57 ppm; [AIHA] Isoprene, stabilized (UN1218) has warning of explosive polymerization; [ERG 2016]

合成工艺路线路线简述

海关参考信息

• 2901210000-乙烯
  2901220000-丙烯
  2901241000-1,3-丁二烯
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其他信息查阅

• ➥ 象形图和危险代码
• ➥ 防范代码详解
• ➥ 危险代码说明
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