1、 Overview
Indicative formula: HCHO molecular weight: 30.00 common name: Fuer Malin
Properties: This product is colorless, pungent and malodorous liquid. It is easy to polymerize at low temperature to form white precipitate insoluble in water; The relative density of 37% solution is 1.075-1.085, the boiling point is 101 ℃, and 9-13% methanol is often added as polymerization inhibitor for industrial products. Water solubility; It is flammable and has the risk of combustion in case of fire and heat source; The flash point of 37% formaldehyde solution without formaldehyde is 85 ℃; Violent reaction in contact with oxidant; It has high toxicity, strong irritation and corrosivity. It belongs to other corrosive articles, and the UN number is un1198.
IIPurpose:
It is one of the important organic chemical raw materials. It is widely used in the preparation of polyformaldehyde resin, phenolic resin, urea formaldehyde resin, melamine resin, nylon fiber and other organic synthesis industries.
IIIProduct quality:Meet the following standards (GB / t2750-2002 analytical purity)
Test items | Standard requirements |
appearance | Colorless and transparent liquid. During storage, a small amount of precipitation or turbidity caused by low temperature condensation of formaldehyde is allowed. |
PH value (20 ℃), | 2.5-4.5 |
Density (20 ℃), g / ml | 1.07-1.09 |
Content (HCHO),% | 35.0-37.0 |
Ethanol (C2H5OH),% | ≤1.0 |
Acidity (calculated by formic acid),% | ≤0.05 |
Burning residue,% | ≤0.001 |
Iron (FE),% | ≤0.0001 |
Heavy metals (calculated by Pb),% | ≤0.0001 |
Calcium (CA),% | ≤0.002 |
Chloride (calculated as CL),% | ≤0.005 |
Sulfate (calculated as SO4),% | ≤0.001 |
IVPacking and storage :
Reagent formaldehyde solution has the following three packages:
1. 500ml bottles, 20 bottles per box.
2. 2500ml bottles, 4 bottles per box.
3. 25-200kg barrel.
It should be stored in a dry and ventilated warehouse, preferably 21-25 ℃. It is easy to oligomerize at low temperature and should not be stored for too long.
Valid for three months.
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