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15512

Sigma-Aldrich

Formaldehyde solution

meets analytical specification of USP, ≥34.5 wt. %

Synonym(s):
Formalin
Linear Formula:
HCHO
CAS Number:
Molecular Weight:
30.03
Beilstein:
1209228
MDL number:
eCl@ss:
39021101
PubChem Substance ID:
NACRES:
NA.21

Quality Level

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

SMILES string

[H]C([H])=O

InChI

1S/CH2O/c1-2/h1H2

InChI key

WSFSSNUMVMOOMR-UHFFFAOYSA-N

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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.

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Danger

Hazard Classifications

Acute Tox. 2 Inhalation - Acute Tox. 3 Dermal - Acute Tox. 3 Oral - Carc. 1B - Eye Dam. 1 - Muta. 2 - Skin Corr. 1B - Skin Sens. 1 - STOT SE 1 - STOT SE 3

Target Organs

Respiratory system

Storage Class Code

6.1A - Combustible, acute toxic Cat. 1 and 2 / very toxic hazardous materials

WGK Germany

WGK 3

Flash Point F

143.6 °F

Flash Point C

62 °C

Certificate of Analysis

Certificate of Origin

Lanthanide triflates as water-tolerant Lewis acids. Activation of commercial formaldehyde solution and use in the aldol reaction of silyl enol ethers with aldehydes in aqueous media.
Kobayashi S and Hachiya I.
The Journal of Organic Chemistry, 59(13), 3590-3596 (1994)
Lanthanide Trifluoromethanesulfonates as Stable Lewis Acids in Aqueous Media. Yb (OTf)3 Catalyzed Hydroxymethylation Reaction of Silyl Enol Ethers with Commercial Formaldehyde Solution.
Kobayashi S.
Chemistry Letters (Jpn), 12, 2187-2190 (1991)
Microwave synthesis of nanocrystalline metal sulfides in formaldehyde solution.
Liao X-H, et al.
Materials Science and Engineering, B, 85(1), 85-89 (2001)
Opas Bunkoed et al.
Analytica chimica acta, 659(1-2), 251-257 (2010-01-28)
We report the development of transparent sol-gels with entrapped sensitive and selective reagents for the detection of formaldehyde. The sampling method is based on the adsorption of formaldehyde from the air and reaction with beta-diketones (for example acetylacetone) in a...
Cindy S Ma et al.
The Journal of experimental medicine, 205(7), 1551-1557 (2008-07-02)
Hyper-immunoglobulin E syndrome (HIES) is a primary immune deficiency characterized by abnormal and devastating susceptibility to a narrow spectrum of infections, most commonly Staphylococcus aureus and Candida albicans. Recent investigations have identified mutations in STAT3 in the majority of HIES...

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