Description
Formaldehyde is colorless gas with a very distinct, pungent odor. It is highly soluble in water and in a variety of organic solvents. It has the potential to react explosively with peroxides and nitrogen oxide.
Formalin, the aqueous form of formaldehyde, is a colorless liquid with a very distinct, pungent odor. It is incompatible and may react with strong oxidizers, alkalis,and acids. The liquid has a variable molecular weight, which is dependent on the specific aqueous formulation.
Formaldehyde is used in various organic synthesis and reactions. It is used in the textile industry in the area of crosslinking molecules to vary the properties of fabrics. In the food industry it is used to reinforce and improve packaging of meats and produce. It can help improve the water resistance of biodegradable collagen films.
Basic Attributes
Molecular Weight：30.02600
Exact Mass：30.03
EC Number：200-001-8
HScode：2912110000
Characteristics
PSA：17.07000
XLogP3：0.45100
Appearance：Solids containing varying amounts of formaldehyde, probably as paraformaldehyde (polymers of formula HO(CH2O)xH where x averages about 30). A hazard to the environment. Immediate steps should be taken to limit spread to the environment.
Solids containing varying amounts of formaldehyde, possibly paraformaldehyde (a polymer with the chemical formula HO(CH2O)xH, where x averages about 30). Harmful to the environment. Immediate measures should be taken to limit the spread of the virus to the environment.
Density：0.8 g/cm3
Melting Point：-92 °C
Boiling Point：-19.5 °C
Flash Point：50 °C (122 °F) for 37 % formaldehyde (15 % methanol)(closed cup); 85 °C (185 °F) for 37 % formaldehyde (methanol free)(closed cu
Refractive Index：7 g/L (25 ºC)
Water Solubility：H2O: soluble , > 100 g/100 ml（20 °C）
Storage Conditions：2-8ºC
Vapor Pressure：>1 atm (20 °C)
Vapor Density：300ºC
Toxicity：LD50 oral (rat) 500 mg/kg LD50 skin (rabbit) 270 mg/kg LC50 inhal (rat) 203 mg/m3 (2 h) PEL (OSHA) 1 ppm (1.5 mg/m3) TLV-TWA (ACGIH) 0.3 ppm (ceiling)(0.37 mg/m3) STEL (OSHA) 2 ppm (2.5 mg/m3)
Flammability characteristics：Flammable Gas
Explosive limit：vol% in air: 7.03.0
Odor：Pungent, suffocating odor
PH：pH: 2.8 to 4.0 /Formaldehyde soln/
PKA：13.3(at 25 °C)
Use
Formaldehyde is used in various organic synthesis and reactions. It is used in the textile industry in the area of crosslinking molecules to vary the properties of fabrics. In the food industry it is used to reinforce and improve packaging of meats and produce. It can help improve the water resistance of biodegradable collagen films.
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