L040082
Cap A
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About This Item
NACRES:
NA.21
UNSPSC Code:
12352200
Preparation Note
Acetic Anhydride / Tetrahydrofurane 9.1/90.9 (v/v)
Other Notes
Cap A solution, containing acetic anhydride and tetrahydrofuran (THF), is used after the phosphoramidite reaction/coupling step. This solution aborts chains bearing unreacted 5′hydroxyl groups due to failure of reaction with activated phosphoramidite (typically, 1 to 2% of growing oligonucleotide chains in each synthesis cycle). These unreacted 5′hydroxyl groups are capped with an acetyl group and thus rendered unreactive for subsequent synthesis steps.
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signalword
Danger
Hazard Classifications
Acute Tox. 3 Inhalation - Acute Tox. 4 Oral - Carc. 2 - Eye Dam. 1 - Flam. Liq. 2 - Skin Irrit. 2 - STOT SE 3
target_organs
Respiratory system
supp_hazards
Storage Class
3 - Flammable liquids
wgk
WGK 1
flash_point_f
6.1 °F
flash_point_c
-14.4 °C
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