纳米铬粉

特性用途纳米铬粉试剂级价格

纳米铬粉化学性质

熔点 :1857 °C (lit.)
沸点 :2672 °C (lit.)
密度 :7.14 g/mL at 25 °C (lit.)
闪点 :50 °F
储存条件 :no restrictions.
溶解度 :reacts with dilute acid solutions
形态 :powder
比重 :7.2
颜色 :Silver-gray
PH值 :<1 (H2O, 20°C)
气味 (Odor) :Odorless
电阻率 (resistivity) :12.7 μΩ-cm, 20°C
水溶解性 :Insoluble in water.
Merck :13,2252
暴露限值 :TLV-TWA: chromium metal 0.5 mg/m³ (ACGIH and MSHA), 1 mg/m³ (OSHA); Cr(II) and Cr(III) compounds 0.5 mg/m³ (ACGIH); Cr(VI) compounds, water soluble and certain water insoluble, 0.05 mg/m³ (ACGIH).
稳定性 :Stable. Incompatible with carbonates, strong bases, mineral acids, lithium, sulfur dioxide, strong acids.
CAS 数据库 :7440-47-3(CAS DataBase Reference)
(IARC)致癌物分类 :3 (Vol. Sup 7, 49) 1990
NIST化学物质信息 :Chromium(7440-47-3)
EPA化学物质信息 :Chromium (7440-47-3)

安全信息

危险品标志 :F,C,Xn,Xi
危险类别码 :11-20/21/22-34-40-23-67-36
安全说明 :16-26-36/37/39-45-36/37-27
危险品运输编号 :UN 2924 3/PG 2
WGK Germany :3
RTECS号 :GB4200000
自燃温度 :580°C
TSCA :Yes
海关编码 :8112 21 90
危险等级 :4.1
包装类别 :III
毒害物质数据 :7440-47-3(Hazardous Substances Data)
毒性 :Elemental chromium and certain chromium compounds have been designated as carcinogens, hazardous substances, hazardous waste constituents, and priority toxic pollutants. Some of those compounds designated as hazardous are chromic acetate, chromic acid, chromic sulfate, and chromous chloride. Although chromium in the 6+ state is regarded as being the most carcinogenic, there are 6+ compounds that appear to be non-carcinogenic. In addition to their possible carcinogenicity, chromium compounds may have local allergic effects leading to dermatitis. Systemically, 6+ chromium compounds are irritants to the respiratory system and may give rise to pulmonary edema.
立即威胁生命和健康浓度 :250 mg Cr/m3

纳米铬粉 MSDS

纳米铬粉

胶体磷[32P]酸铬注射液|药典2005版

特性
纳米铬粉是一种黑色粉末，质硬，耐腐蚀。密度为7.20克/cm3，可溶于强碱溶液。铬具有很高的耐腐蚀性，在空气中,即便是在赤热的状态下氧化也很慢。纳米铬粉通过可变电流激光离子束气相法工艺生产，纯度高，粒度均匀，表面结构完整，易分散，比表面积大，表面活性高。
用途
纳米铬粉由于具有很高的表面活性和优良的导电性能而被广泛用于半导体、导电涂料、化工催化剂及太阳能吸收体：
1.用于制不锈钢,汽车零件,工具,磁带和录像带等。铬镀在金属上可以防锈，也叫可多米,坚固美观。
2用于制不锈钢。红绿宝石的色彩也来至于铬,作为现代科技中最重要的金属以不同百分比熔合的铬镍钢千变万化，种类繁多，令人难以置信。
3.可用作耐光，耐热涂料，也可用于磨料，玻璃，陶瓷的着色剂，化学合成的催化剂。