Merck
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34998

Sigma-Aldrich

Acetonitrile

HPLC Plus, ≥99.9%

Synonym(s):
ACN, Cyanomethane, Ethyl nitrile, Methyl cyanide
Linear Formula:
CH3CN
CAS Number:
Molecular Weight:
41.05
Beilstein:
741857
EC Number:
MDL number:
eCl@ss:
39031501
PubChem Substance ID:
NACRES:
NA.03

grade

HPLC Plus

Quality Level

vapor density

1.41 (vs air)

vapor pressure

72.8 mmHg ( 20 °C)

assay

≥99.9%

form

liquid

autoignition temp.

973 °F

expl. lim.

16 %

baseline drift measuring range

≤12 mAU (210 nm)

technique(s)

HPLC: suitable
IR spectroscopy: suitable

impurities

≤0.0001% free alkali (as NH3)
≤0.0002% non-volatile matter
≤0.001% free acid (as CH3COOH)
≤0.01% water (Karl Fischer)
≤0.5 ppb fluorescence (quinine) at 254 nm
≤0.5 ppb fluorescence (quinine) at 365 nm

halogenated residue

10 ng/L (as heptachlor epoxide)

refractive index

n20/D 1.344 (lit.)

bp

81-82 °C (lit.)

mp

−45 °C (lit.)

density

0.786 g/mL at 25 °C (lit.)

HPLC-gradient

≤0.2 mAU at 254 nm
≤1 mAU at 210 nm

λ

H2O reference

UV absorption

λ: 195 nm Amax: ≤0.10
λ: 200 nm Amax: ≤0.02
λ: 228 nm Amax: ≤0.005
λ: 235 nm Amax: ≤0.0044
λ: 250 nm Amax: ≤0.0044
λ: 400 nm Amax: ≤0.0044

application(s)

food and beverages

SMILES string

CC#N

InChI

1S/C2H3N/c1-2-3/h1H3

InChI key

WEVYAHXRMPXWCK-UHFFFAOYSA-N

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General description

Acetonitrile (MeCN) is widely employed as a solvent in various studies and has high dielectric constant (37.5). Various purification procedures to obtain different grades of acetonitrile for use in different studies (polarography, spectroscopy, etc.) have been reported by many researchers.

Application

Acetonitrile has been used to compose the gradient system for the HPLC detection of diphenylmethane diisocyanate, a polymeric degradation product.
New Quality UPLC Plus Acetonitrile is suitable for all applications including:
Mass spectrometry, HPLC, TLC, GPC, UV, IR, GC, Pesticide Residue Analysis, and RNA/DNA Synthesis and Purification.

Packaging

1, 6×1, 2.5, 4×2.5, 4, 4×4 L in glass bottle
20 L in Nowpak™
20, 50 L in Pure-Pac™ 2
200 L in Pure-Pac™ 1
200 L in Pure-Pac™ 2

Preparation Note

Product filtered through a 0.2 μm filter

Other Notes

Pure-Pac® II containers require the Micromatic MacroValve coupler for dispensing solvents, Z560723.
Important notice
  • The article number 34998-4X2.5L will be discontinued. Please order the single bottle 34998-2.5L which is physically identical with the same exact specifications.
  • The article number 34998-6X1L will be discontinued. Please order the single bottle 34998-1L which is physically identical with the same exact specifications.

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Legal Information

Pure-Pac is a registered trademark of Sigma-Aldrich Co. LLC

Pictograms

FlameExclamation mark

Signal Word

Danger

Hazard Classifications

Acute Tox. 4 Dermal - Acute Tox. 4 Inhalation - Acute Tox. 4 Oral - Eye Irrit. 2 - Flam. Liq. 2

Storage Class Code

3 - Flammable liquids

WGK

WGK 2

Flash Point(F)

35.6 °F - closed cup

Flash Point(C)

2.0 °C - closed cup

Certificate of Analysis

Enter Lot Number to search for Certificate of Analysis (COA).

Certificate of Origin

Enter Lot Number to search for Certificate of Origin (COO).

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