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L050031

Sigma-Aldrich

Cap B

product line

Proligo Reagents

Quality Level

assay

conforms (Formulation, GC)

impurities

≤120 ppm water content (Karl Fischer)

color

clear Appearance of Solution

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Preparation Note

Tetrahydrofurane / N-Methylimidazole 84/16 (v/v)

Other Notes

Cap B solution, containing tetrahydrofuran (THF) and N-methylimidazole (NMI), is mixed in situ with Cap A solution during the capping (acetylation) reaction. Lutidine is applied as a mild base while NMI provides a powerful acylation catalyst.

Signal Word

Danger

Hazard Classifications

Acute Tox. 4 Dermal - Acute Tox. 4 Oral - Carc. 2 - Flam. Liq. 2 - Skin Corr. 1B - STOT SE 3

Target Organs

Respiratory system

Supplementary Hazards

Storage Class Code

3 - Flammable liquids

WGK

WGK 1

Flash Point(F)

6.1 °F

Flash Point(C)

-14.4 °C

Certificate of Analysis

Certificate of Origin

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