国产粉嫩高中无套进入,G片男A同志Y免费网站,性强烈的欧美三级视频,黑人异族巨大巨大巨粗

Product Name: 30% hydrogen peroxide                 levels: AR / CP

Implementation of the standards: GB / T 6684-2002

Molecular formula: H2O2

Properties: This reagent is colorless transparent liquid oxidant, insoluble in water, alcohol and ether. Density 1.11 g / cm3, corrosive, when you place gradually broken down into oxygen and water. When the reservoir is not filled

Hazardous characteristics: strong oxidants explosive. Hydrogen peroxide itself is non-flammable, but combustible materials can release a lot of heat and react with oxygen and cause a fire explosion. Hydrogen peroxide at a pH of 3.5 to 4.5 when the most stable, easy to decompose in alkaline solution, in the case of light, in particular, can decompose shortwave radiation exposure. When heated to above 100 ℃, began a sharp decomposition. It is with many organic materials such as sugar, starch, alcohol, petroleum products and other form explosive mixtures under impact, heat or spark action can explode. Hydrogen peroxide and many inorganic compounds or impurities decompose rapidly after exposure caused an explosion and emit a lot of heat, oxygen and water vapor. Most heavy metals (such as iron, copper, silver, lead, mercury, zinc, cobalt, nickel, chromium, manganese, etc.) and their oxides and salts are the active catalyst, dust, cigarette ash, carbon, rust can accelerating decomposition. More than 74% of the concentration of hydrogen peroxide, in a closed vessel or ignition source having a temperature in the gas phase to produce an explosion.

Materials to avoid: flammable or combustible materials, strong reducing agents, copper, iron, iron, zinc, active metal powder.