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L031100

Activator 42®

0.25 M

Synonym(s):

5-[3,5-Bis(trifluoromethyl)phenyl]-1H-tetrazole Solution, 5-[3,5-Bis(trifluoromethyl)phenyl]-2H-tetrazole Solution, Activator 42® Solution

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Size/SKUAvailabilityPrice
6 x 450 mL

Estimated to ship onJune 12, 2026fromMILWAUKEE

$572.00
10 L

Estimated to ship onJuly 13, 2026fromMILWAUKEE

$1,390.00
4 x 2.5 L

Available to ship TODAYfromMILWAUKEE

$1,390.00

About This Item

CAS Number:
UNSPSC Code:
41106305
NACRES:
NA.21
Form:
liquid
Storage condition:
dry at room temperature

$572.00


Estimated to ship onJune 12, 2026Details


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Quality Segment

type

for DNA synthesis

product line

Proligo Reagents

form

liquid

storage condition

dry at room temperature

concentration

70-77 g/L (Activator 42 content, titration)

impurities

≤30 ppm water content (Karl Fischer)

color

clear

SMILES string

FC(F)(F)c1cc(cc(c1)c2n[nH]nn2)C(F)(F)F

InChI

1S/C9H4F6N4/c10-8(11,12)5-1-4(7-16-18-19-17-7)2-6(3-5)9(13,14)15/h1-3H,(H,16,17,18,19)

InChI key

KKJFZIQEWZVVIV-UHFFFAOYSA-N

Preparation Note

Acetronitrile / Activator 42 100 / 7 (v/w)

Other Notes

Activator solution, containing 5-(3,5-bis(trifluoromethyl)phenyl)-1H-tetrazole (Activator 42) in acetonitrile, are mixed with solutions of phosphoramidites during the extension step.
The activator reacts with the amidite group to form a highly reactive intermediate. The intermediate then forms an internucleotide bond with the detritylated 5′hydroxyl group of the growing oligonucleotide chain.

Legal Information

This product and it use is are covered under US Patent Number 7,897,758
Activator 42 is a registered trademark of Sigma-Aldrich Co. LLC

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This Item
L031180L031200L031000
form

liquid

form

-

form

-

form

-

Quality Level

200

Quality Level

200

Quality Level

200

Quality Level

200

storage condition

dry at room temperature

storage condition

dry at room temperature

storage condition

dry at room temperature

storage condition

dry at room temperature

color

clear

color

clear

color

clear

color

clear

product line

Proligo Reagents

product line

Proligo Reagents

product line

Proligo Reagents

product line

Proligo Reagents

impurities

≤30 ppm water content (Karl Fischer)

impurities

≤30 ppm water content (Karl Fischer)

impurities

≤30 ppm water content (Karl Fischer)

impurities

≤30 ppm water content (Karl Fischer)


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pictograms

FlameExclamation mark

signalword

Danger

Hazard Classifications

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

Storage Class

3 - Flammable liquids

wgk

WGK 3

flash_point_f

41.0 °F

flash_point_c

5 °C



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