402826

重铬酸铵

ACS reagent, ≥99.5%

• 别名: 红矾铵
• 线性分子式: (NH₄)₂Cr₂O₇
• CAS号: 7789-09-5
• 分子量: 252.06
• EC 号: 232-143-1
• MDL编号: MFCD00010879
• UNSPSC代码: 12352302
• eCl@ss: 38180716
• PubChem化学物质编号: 329755966
• NACRES: NB.24

属性

• 等级: ACS reagent
• 蒸汽密度: 8.7 (vs air)
• 方案: ≥99.5%
• 表单: crystals
• 反应适用性: reagent type: oxidant
• 杂质: ≤0.005% insolubles
• 缺失: ≤3.0% loss on drying
• pH值（酸碱度）: 3-4 (25 °C, 50 g/L)
• mp: 170 °C (dec.) (lit.)
• 痕量阴离子: chloride (Cl^-): ≤0.005%; sulfate (SO₄^2-): ≤0.01%
• 痕量阳离子: Ca: ≤0.002%; Fe: ≤0.002%; Na: ≤0.005%
• SMILES字符串: N.N.O[Cr](=O)(=O)O[Cr](O)(=O)=O
• InChI: 1S/2Cr.2H3N.2H2O.5O/h;;2*1H3;2*1H2;;;;;/q2*+1;;;;;;;;;/p-2
• InChI key: XAQCJVGGJJFLPP-UHFFFAOYSA-L

说明

一般描述

Ammonium dichromate is a hexavalent chromium compound with a high oxidation potential.[1] Hexavalent chromium is potent carcinogen and an environmental pollutant.[2]

应用

Ammonium dichromate may be used in the following processes:

• Oxidation of alcohols in the presence of Mg(HSO₄)₂ (magnesium hydrogen sulfate) and wet SiO₂ (silicon dixide).[3]
• Preparation of Cr₂O₃/Al₂O₃ (chromium (III) oxide/aluminium oxide) catalysts.[4]
• Oxidative coupling of thiols.[5]
• Preparation of mesoporous molecular sieves.[6]
• Preparation of polypyrrole (PPy).[7]
• Preparation of solid oxide fuel cell (SOFC) interconnect.[8]

安全信息

• 象形图: GHS03,GHS06,GHS08,GHS05,GHS09
• 警示用语：: Danger
• 危险声明: H272,H301,H312,H314,H317,H330,H334,H340,H350,H360,H372,H410
• 预防措施声明: P210 - P260 - P280 - P303 + P361 + P353 - P304 + P340 + P310 - P305 + P351 + P338
• 危险分类: Acute Tox. 2 Inhalation - Acute Tox. 3 Oral - Acute Tox. 4 Dermal - Aquatic Acute 1 - Aquatic Chronic 1 - Carc. 1B - Eye Dam. 1 - Muta. 1B - Ox. Sol. 2 - Repr. 1B - Resp. Sens. 1 - Skin Corr. 1B - Skin Sens. 1 - STOT RE 1
• 储存分类代码: 4.1A - Other explosive hazardous materials
• WGK: WGK 3
• 闪点(°F): Not applicable
• 闪点(°C): Not applicable