Sigma-Aldrich Pyridine For Analysis Emsure

grade

ACS reagent

Quality Level

300

agency

reag. pH. Eur.

vapor pressure

26.7 hPa ( 25 °C)

product line

EMSURE^®

assay

≥99.5% (GC)

form

liquid

autoignition temp.

482 °C

potency

891 mg/kg LD₅₀, oral (Rat)
1121 mg/kg LD₅₀, skin (Rabbit)

dilution

(for analytical testing)

impurities

≤0.002% Ammonia (NH₃)
≤0.01% Piperidine (GC)
≤0.1% Water
≤0.2% 2-Picoline (GC)

evapn. residue

≤0.002%

color

clearAPHA: ≤10

pH

8.81 (20 °C in H₂O)

bp

115 °C/1013 hPa

mp

-42 °C

transition temp

flash point 17 °C

density

0.982 g/cm³ at 20 °C

anion traces

chloride (Cl^-): ≤0.0005%
sulfate (SO₄^2-): ≤0.0005%

cation traces

Al: ≤0.00005%
B: ≤0.000002%
Ba: ≤0.00001%
Ca: ≤0.00005%
Cd: ≤0.000005%
Co: ≤0.000002%
CR: ≤0.000002%
Cu: ≤0.000002%
Fe: ≤0.00001%
mg: ≤0.00001%
Mn: ≤0.000002%
Ni: ≤0.000002%
Pb: ≤0.00001%
Sn: ≤0.00001%
Zn: ≤0.00001%

storage temp.

2-30°C

SMILES string

n1ccccc1

InChI

1S/C5H5N/c1-2-4-6-5-3-1/h1-5H

Inchi Key

JUJWROOIHBZHMG-UHFFFAOYSA-N

• Enantioselective separation of amino acids as biomarkers indicating life in extraterrestrial environments.: Research on using pyridine-based chromatography for the enantioselective separation of amino acids, which can help in the search for extraterrestrial life by analyzing amino acid chirality (Pietrogrande, 2013).