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15512 Sigma-Aldrich

Formaldehyde solution

meets analytical specification of USP, ≥34.5 wt. %

Synonym: Formalin

  • CAS Number 50-00-0

  • Linear Formula HCHO

  • Molecular Weight 30.03

  •  Beilstein/REAXYS Number 1209228

  •  MDL number MFCD00003274

  •  eCl@ss 39021101

  •  PubChem Substance ID 57647382

  •  NACRES NA.21

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Properties

Related Categories Aldehydes, Building Blocks, C1 to C6, Carbonyl Compounds, Chemical Synthesis,
Quality Level   200
vapor density   1.03 (vs air)
vapor pressure   52 mmHg ( 37 °C)
assay   ≥34.5 wt. %
autoignition temp.   572 °F
quality   meets analytical specification of USP
contains   9.0-15.0% methanol as stabilizer (GC)
concentration   25-50%
impurities   acidic reac. substances, complies
  residual solvents, complies
ign. residue   ≤0.01% (as SO4)
density   1.09 g/mL at 25 °C (lit.)
suitability   corresponds for identity
storage temp.   room temp
SMILES string   [H]C([H])=O
InChI   1S/CH2O/c1-2/h1H2
InChI key   WSFSSNUMVMOOMR-UHFFFAOYSA-N

Description

General description

Formaldehyde solution commercially formaldehyde solution is an aqueous solution containing 37% formaldehyde and 8-10% methanol. Formaldehyde solution can be activated by adding the catalytic amount of lanthanide triflate. This activated formaldehyde solution was employed for the smooth hydroxymethylation reaction of silyl enol ethers. Formaldehyde solution reacts with silyl enol ethers to afford the corresponding hydroxymethylated adducts in high yields.

Application

Formaldehyde solution was used to prepare the formaldehyde stock solution for the development of transparent sol-gels with entrapped sensitive and selective reagents for the detection of formaldehyde in air. It may be used in the preparation of nanocrystalline metal (Cu, Hg, Zn, Bi, Pb) sulfides having different shapes and different particle sizes.

Other Notes

The article number 15512-4X2.5L-R will be discontinued. Please order the single bottle 15512-2.5L-R which is physically identical with the same exact specifications.
The article number 15512-6X1L-R will be discontinued. Please order the single bottle 15512-1L-R which is physically identical with the same exact specifications.

Safety & Documentation

Safety Information

Signal word 
Danger
Target organs 
Eyes, Respiratory system
RIDADR 
UN 2209 8 / PGIII
WGK Germany 
WGK 3
Flash Point(F) 
133.0 °F - closed cup
Flash Point(C) 
56.11 °C - closed cup

Documents

Certificate of Analysis (COA)

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Protocols & Articles
Peer-Reviewed Papers
15

References

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