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A4388312

Formaldehyde solution , analyticalstandard,100mg/L,in5%ethanol , 50-00-0

Synonym(s):
Formaldehyde Solution;Formaldehydi solutio 35 per centum;Formalin;Formalin, Formaldehyde;Formaline solution, Methanal solution, Methylaldehyde solution

CAS NO.:50-00-0

Empirical Formula: CH2O

Molecular Weight: 30.03

MDL number: MFCD00003274

EINECS: 200-001-8

Update time: 2022-07-08

PRODUCT Properties

Melting point: -15°C
Boiling point: 97°C(37% solution),-19.5°C(pure)
Density  1.09 g/mL at 25 °C(lit.)
vapor density  1.03 (vs air)
vapor pressure  52 mm Hg ( 37 °C)
refractive index  n20/D 1.377
Flash point: 133 °F
storage temp.  room temp
solubility  water: soluble
form  Solution
pka 13.27(at 25℃)
color  APHA: ≤10
PH pH (25℃) : 7.0~7.5
Odor Pungent odor detectable at 1 ppm
Odor Threshold 0.5ppm
Water Solubility  soluble
λmax λ: 260 nm Amax: 0.01
λ: 280 nm Amax: 0.01
Merck  14,4235
BRN  1209228
Henry's Law Constant 2.08(x 10-7 atm?m3/mol) at 25 °C (flow-type generation system, spectrophometry, Kanda et al., 2005)
Exposure limits NIOSH REL: TWA 0.016 ppm, 15-min C 0.1 ppm, IDLH 20 ppm; OSHA PEL: TWA 0.75 ppm, STEL 2 ppm.
Dielectric constant 23.0(Ambient)
InChIKey WSFSSNUMVMOOMR-UHFFFAOYSA-N
LogP 0.350
CAS DataBase Reference 50-00-0(CAS DataBase Reference)
IARC 1 (Vol. Sup 7, 62, 88, 100F) 2012
NIST Chemistry Reference Formaldehyde(50-00-0)
EPA Substance Registry System Formaldehyde (50-00-0)

Description and Uses

Formaldehyde is a colorless, flammable gas with a distinctive pungent odor. It is the simplest aldehyde, which is a class of organic compounds with the carbonyl group bonded to at least one hydrogen atom. Formaldehyde was described by August Wilhelm von Hoff mann (1818–1892) in 1867 after the Russian Aleksandr Butlerov (1828–1886) had inadvertently synthesized it in 1857. Formaldehyde readily dissolves in water to produce a solution called formalin, which is commonly marketed as a 37% solution.

Formaldehyde is used in the manufactureof phenolic resins, cellulose esters, artificialsilk, dyes, explosives, and organic chemicals.Other uses are as a germicide, fungicide, anddisinfectant; in tanning, adhesives, waterproofingfabrics, and for tonic and chromeprinting in photography; and for treating skindiseases in animals. In vitro neutralizationof scorpion venom toxicity by formaldehydehas been reported (Venkateswarlu et al.1988).
Formaldehyde constitutes about 50% ofall aldehydes present in the air. It is oneof the toxic effluent gases emitted fromburning wood and synthetic polymeric substancessuch as polyethylene, nylon 6, andpolyurethane foams. Firefighters have a greaterrisk to its exposure. Incapacitation fromthe toxic effluent gases is reported to occurmore rapidly from the combustion of syntheticpolymers than from that of naturalcellulose materials.
Formaldehyde is directly emitted into theair from vehicles. It is released in traceamounts from pressed wood products suchas particleboard and plywood paneling, fromold “sick” buildings, and from cotton andcotton–polyester fabrics with selected crosslinkfinishes. Formation of formaldehyde hasbeen observed in some frozen gadoid fishdue to enzymic decomposition of the additivetrimethylamine oxide (Rehbein 1985).Its concentration can build up during frozenstorage of fish (Leblanc and Leblanc 1988;Reece 1985). It occurs in the upper atmosphere,cloud, and fog; it also forms inphotochemical smog processes.

Safety

Symbol(GHS) 
GHS05,GHS06,GHS08
Signal word  Danger
Hazard statements  H301+H311-H314-H317-H330-H335-H341-H350-H370
Precautionary statements  P202-P260-P280-P303+P361+P353-P304+P340+P310-P305+P351+P338
Hazard Codes  T
Risk Statements  23/24/25-34-40-43-39/23/24/25-68-45-68/20/21/22
Safety Statements  36/37-51-45-36/37/39-26-53
OEB E
OEL TWA: 0.016 ppm, Ceiling: 0.1 ppm [15-minute]
RIDADR  UN 1198 3/PG 3
WGK Germany  2
RTECS  LP8925000
10
Autoignition Temperature 424 °C for formalin containing 15% methanol
TSCA  Yes
HazardClass  3
PackingGroup  III
HS Code  29121100
Hazardous Substances Data 50-00-0(Hazardous Substances Data)
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)
IDLA 20 ppm

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