BUFFERS

Buffers

CAS #

Useful pH Range

pKa
N-(2-Acetamido)-2-aminoethanesulfonic acid

ACES

7365-82-4

6.1 - 7.5

6.8
N-(2-(Acetamido)imino)diacetic acid

ADA

26239-55-4

6.0 - 7.2

6.59
2-Amino-2-methyl-1-propanol

AMP

124-68-5

9.0 - 10.5

9.70
2-Amino-2-methyl-1,3-propanediol

AMPD

115-69-5

7.8 - 9.7

8.80
N-(1,1-Dimethyl-2-hydroxyethyl)-3-amino-2-hydroxypropanesulfonic acid

AMPSO

68399-79-1

8.3 - 9.7

9.00
N,N-Bis(2-hydroxyethyl)-2-aminoethanesulfonic acid

BES

10191-18-1

6.4 - 7.8

7.09
N,N-Bis(2-hydroxyethyl)glycine

Bicine

150-25-4

7.6 - 9.0

8.3
2,2'-(Propane-1,3-diyldiimino)bis[2-(hydroxymethyl)propane-1,3-diol]

Bis-Tris Propane

64431-96-5

6.3 - 9.5

(1) 6.8, (2) 9.0
2-[Bis(2-hydroxyethyl)imino]-2-(hydroxymethyl)-1,3-propanediol

Bis-Tris

6976-37-0

5.8 - 7.2

6.50
2-[Bis(2-hydroxyethyl)imino]-2-(hydroxymethyl)-1,3- propanediol Hydrochloride

BIS-TRIS HCl

124763-51-5

5.8 - 7.2

6.50
4-(Cyclohexylamino)-1-butanesulfonic acid

CABS

161308-34-5

10.0 - 11.4

10.70
3-(Cyclohexylamino)-1-propanesulfonic acid

CAPS

1135-40-6

9.7 - 11.1

10.40
3-(Cyclohexylamino)-2-hydroxy-1-propanesulfonic acid

CAPSO

73463-39-5

8.9 - 10.3

9.60
2-(Cyclohexylamino)ethanesulfonic acid

CHES

103-47-9

8.6 - 10.0

9.49
3-[N-Bis(hydroxyethyl)amino]-2-hydroxypropanesulfonic acid

DIPSO

68399-80-4

7.0 - 8.2

7.60
4-(2-Hydroxyethyl)piperazine-1-propanesulfonic acid

EPPS

16052-06-5

7.3 - 8.7

8.00
N-Glycylglycine

Gly-Gly

556-50-3

7.5 - 8.9

8.20
N-(2-Hydroxyethyl)piperazine-N'-(4-butanesulfonic acid)

HEPBS

161308-36-7

7.6 - 9.0

8.30
4-(2-Hydroxyethyl)-1-piperazineethanesulfonic acid

HEPES

7365-45-9

6.8 - 8.2

7.55
4-(2-Hydroxyethyl)-1-piperazineethanesulfonic acid Hemisodium salt

HEPES Hemisodium

103404-87-1

8.2

7.55
4-(2-Hydroxyethyl)-1-piperazineethanesulfonic acid Potassium salt

HEPES potassium

82207-62-3

6.8 - 8.2

7.55
4-(2-Hydroxyethyl)-1-piperazineethanesulfonic acid Sodium salt Hydrate

HEPES Sodium Hydrate

75277-39-3

6.8 - 8.2

7.5

Imidazole

Imidazole

288-32-4

6.2 - 7.8

 
2-(4-Morpholino)ethanesulfonic acid

MES

4432-31-9

5.5 - 6.7

6.2
2-(4-Morpholino)ethanesulfonic acid Sodium salt

MES sodium

71119-23-8

5.5 - 6.7

6.2

MOBS

115724-21-5

6.9 - 8.3

7.60
3-N-Morpholino propansulfonic acid

MOPS

1132-61-2

6.5 - 7.9

7.2
3-N-Morpholino propansulfonic acid Hemisodium salt

MOPS Hemisodium

117961-20-3

6.5 - 7.9

7.2
3-N-Morpholino propansulfonic acid Sodium salt

MOPS Sodium

71119-22-7

6.5 - 7.9

7.2
3-Morpholino-2-hydroxypropanesulfonic acid

MOPSO

68399-77-9

6.2 - 7.6

6.90
Piperazine-N,N'-bis(2-ethanesulfonic acid)

PIPES

5625-37-6

6.1 - 7.5

6.8
Piperazine-N,N'-bis(2-ethanesulfonic acid) Dipotassium salt

PIPES Dipotassium

108321-27-3

6.1 - 7.5

6.8
Piperazine-N,N'-bis(2-ethanesulfonic acid) Disodium salt

PIPES Disodium

76836-02-7

6.1 - 7.5

6.8
Piperazine-N,N'-bis(2-hydroxypropanesulfonic acid

POPSO

68189-43-5

7.2 - 8.5

7.80
N-Tris(Hydroxymethyl)methyl-4-aminobutanesulfonic acid

TABS

54960-65-5

8.2 - 9.6

8.90
N-(Tris(hydroxymethyl)methyl)-3-aminopropanesulfonic acid

TAPS

29915-38-6

7.7 - 9.1

8.40
N-[Tris(hydroxymethyl)methyl]-3-amino-2-hydroxypropanesulfonic acid

TAPSO

68399-81-5

7.0 - 8.2

7.60
Triethanolamine

TEA

102-71-6

7.3 - 8.3

7.80
N-[Tris(hydroxymethyl)methyl]-2-aminoethanesulfonic acid

TES

7365-44-8

6.8 - 8.2

7.40
N-[Tris(hydroxymethyl)methyl]-2-aminoethanesulfonic acid hemisodium salt

TES hemisodium

 

6.8 - 8.2

7.5
N-(Tris(hydroxymethyl)methyl)glycine

Tricine

5704-04-1

7.4 - 8.8

8.2
Tris(hydroxymethyl)methylamine

Tris

77-86-1

7.0 - 9.1

8.06
Tris(hydroxymethyl)methylamine acetate

Tris Acetate

6850-28-8

7.0 - 9.01

8.06
Tris(hydroxymethyl)methylamine Hydrochloride

Tris Hydrochloride

1185-53-1

7.0 - 9.01

8.06