Buffer

MW

pKa 20℃

Working range

delta pKa per 10℃

MES

195.2

6.15

5.5-6.7

-0.110

Bis-Tris

209.2

6.5

5.8-7.2

ADA

190.2

6.60

6.0-7.2

-0.110

PIPES

302.4

6.80

6.1-7.5

-0.085

ACES

182.2

6.90

6.1-7.5

-0.200

MOPSO

225.3

6.9

6.2-7.6

Imidazol-HCl

68.08

6.95

6.2-7.8

Bis-Tris Propane

282.3

6.8*

6.3-9.5

BES

213.2

7.15

6.4-7.8

-0.160

MOPS

209.3

7.20

6.5-7.9

-0.013

TES

229.2

7.50

6.8-8.2

-0.200

HEPES

238.3

7.55

6.8-8.2

-0.140

DIPSO

243.3

7.6

7.0-8.2

TAPSO

259.3

7.6

7.0-8.2

HEPPSO

268.3

7.8

7.1-8.5

POPSO

362.4

7.8

7.2-8.5

TEA

149.2

7.8

7.3-8.3

EPPS

252.3

8.0

7.3-8.7

Tricine

179.2

8.15

7.4-8.8

-0.210

Tris

121.1

8.30

7.0-9.1

-0.310

Bicine

163.2

8.35

7.6-9.0

-0.180

TAPS

243.3

8.4

7.7-9.1

Glycylglycine

8.40

-0.280

AMPSO

227.3

9.0

8.3-9.7

CHES

207.3

9.3

8.6-10.0

CAPSO

237.3

9.6

8.9-10.3

AMP

89.1

9.7

9.0-10.5

CAPS

221.3

10.4

9.7-11.1