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Buffers and Standards

Hydrogen ion buffers comprising a mixture of a weak acid and its conjugate base or vice-versa and used to stabilize pH; also diluents, washing solutions, and standard-value solutions used for a broad array of scientific calibration purposes.

The buffers used to calibrate pH meters may be certified and/or traceable to the National Institute of Standards and Technology (NIST). These buffers may also be color-coded for easy identification:

  • Red: pH 4.0
  • Yellow: pH 7.0
  • Blue: pH 10.0

 

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1 – 15 of 62 results
2

Hydrogen Sulfide Water, Solution, Spectrum™ Chemical

CAS 7732-18-5
Packaging Amber Glass Bottle
Chemical Name or Material Hydrogen Sulfide Water
Grade Chemical Solution
CAS Max % 99.6
3

Chlorine Water, Saturated Solution, Approx. 0.4% Chlorine, U.S.P. Chlorine Test Solution, Spectrum™ Chemical

CAS: 7782-50-5 Molecular Formula: Cl2 Molecular Weight (g/mol): 70.90 InChI Key: KZBUYRJDOAKODT-UHFFFAOYSA-N IUPAC Name: dichlorine SMILES: ClCl

CAS 7782-50-5
Molecular Weight (g/mol) 70.90
SMILES ClCl
IUPAC Name dichlorine
InChI Key KZBUYRJDOAKODT-UHFFFAOYSA-N
Molecular Formula Cl2
4

Chlorine Water, Saturated Solution, Approx. 0.4% Chlorine, U.S.P. Chlorine Test Solution, Spectrum™ Chemical

CAS: 7782-50-5 Molecular Formula: Cl2 Molecular Weight (g/mol): 70.90 InChI Key: KZBUYRJDOAKODT-UHFFFAOYSA-N IUPAC Name: dichlorine SMILES: ClCl

CAS 7782-50-5
Molecular Weight (g/mol) 70.90
SMILES ClCl
IUPAC Name dichlorine
InChI Key KZBUYRJDOAKODT-UHFFFAOYSA-N
Molecular Formula Cl2
5

Ammonium thioglycolate, 70 wt.% solution in water

Ammonium thioglycolate, 68.0 to 72.0%, C2H7NO2S, CAS Number-5421-46-5, 7732-18-5 | CAS: 5421-46-5 | C2H7NO2S | 109.143 g/mol

Molecular Weight (g/mol) 109.143
Identification ammonium: positive, mercaptane: positive
InChI Key ZZTCCAPMZLDHFM-UHFFFAOYSA-N
Density 1.2200g/mL
PubChem CID 21534
Name Note 70 wt.% solution in water
Percent Purity 68.0 to 72.0%
pH 5.8 to 6.4
Formula Weight 109.15
Melting Point -20.0°C
Boiling Point 115.0°C
Color Colorless
Physical Form Solution
Chemical Name or Material Ammonium thioglycolate
SMILES C(C(=O)[O-])S.[NH4+]
CAS 7732-18-5
Health Hazard 3 GHS P Statement:
Wear protective gloves/protective clothing/eye protection/face protection.
IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician.

WARNING: The information provided on this web site was developed in compliance with European Union (EU) regulations and is correct to the best of our knowledge, information and belief at the date of its publication. The information given is designed only as a guide for safe handling and use. It is not to be considered as either a warranty or quality specification.
MDL Number MFCD00137451
Health Hazard 2 GHS H Statement:
May cause an allergic skin reaction.
Toxic if swallowed.
May be corrosive to metals.
Packaging Glass bottle
Solubility Information Solubility in water: completely soluble.
Health Hazard 1 GHS Signal Word: Danger
Synonym ammonium thioglycolate,ammonium mercaptoacetate,acetic acid, mercapto-, monoammonium salt,thiofaco a-50,ammonium thioglycollate,thioglycolic acid ammonium salt,usaf mo-2,unii-6p9e788vzz,thioglycollic acid, ammonium salt,ammonium 2-mercaptoacetate
IUPAC Name azanium;2-sulfanylacetate
Molecular Formula C2H7NO2S
Specific Gravity 1.22
6

Lithium azide, pure, 20% solution in water

CAS: 19597-69-4 Molecular Formula: LiN3 MDL Number: MFCD00041956

CAS 19597-69-4
MDL Number MFCD00041956
Molecular Formula LiN3
7

Hexafluorophosphoric acid, 60 wt.% solution in water

CAS: 16940-81-1 Molecular Formula: HF6P MDL Number: MFCD00011350 Synonym: Hydrogen hexafluorophosphate

CAS 16940-81-1
MDL Number MFCD00011350
Synonym Hydrogen hexafluorophosphate
Molecular Formula HF6P
8

Benzyltrimethylammonium chloride, 50 wt% solution in water

CAS: 56-93-9 Molecular Formula: C10H16ClN Molecular Weight (g/mol): 185.70 MDL Number: MFCD00011782 InChI Key: KXHPPCXNWTUNSB-UHFFFAOYSA-M Synonym: benzyltrimethylammonium chloride,tmbac,benzyl trimethylammonium chloride,benzyltrimethyl ammonium chloride,benzyl trimethyl ammonium chloride,benzenemethanaminium, n,n,n-trimethyl-, chloride,benzyltrimethylazanium chloride,unii-vnk45y7ba1,ammonium, benzyltrimethyl-, chloride,trimethylbenzylammonium chloride PubChem CID: 5963 IUPAC Name: benzyl(trimethyl)azanium;chloride SMILES: [Cl-].C[N+](C)(C)CC1=CC=CC=C1

PubChem CID 5963
CAS 56-93-9
Molecular Weight (g/mol) 185.70
MDL Number MFCD00011782
SMILES [Cl-].C[N+](C)(C)CC1=CC=CC=C1
Synonym benzyltrimethylammonium chloride,tmbac,benzyl trimethylammonium chloride,benzyltrimethyl ammonium chloride,benzyl trimethyl ammonium chloride,benzenemethanaminium, n,n,n-trimethyl-, chloride,benzyltrimethylazanium chloride,unii-vnk45y7ba1,ammonium, benzyltrimethyl-, chloride,trimethylbenzylammonium chloride
IUPAC Name benzyl(trimethyl)azanium;chloride
InChI Key KXHPPCXNWTUNSB-UHFFFAOYSA-M
Molecular Formula C10H16ClN
9

hydrogen peroxide, 3 wt.% solution in water, stabilized

CAS: 7722-84-1 Molecular Formula: H2O2 Molecular Weight (g/mol): 34.014 MDL Number: MFCD00011333 InChI Key: MHAJPDPJQMAIIY-UHFFFAOYSA-N Synonym: oxydol,perhydrol,superoxol,interox,hydrogen dioxide,inhibine,peroxaan,albone,hioxyl,kastone PubChem CID: 784 ChEBI: CHEBI:16240 IUPAC Name: hydrogen peroxide SMILES: OO

PubChem CID 784
CAS 7722-84-1
Molecular Weight (g/mol) 34.014
ChEBI CHEBI:16240
MDL Number MFCD00011333
SMILES OO
Synonym oxydol,perhydrol,superoxol,interox,hydrogen dioxide,inhibine,peroxaan,albone,hioxyl,kastone
IUPAC Name hydrogen peroxide
InChI Key MHAJPDPJQMAIIY-UHFFFAOYSA-N
Molecular Formula H2O2
10

Thermo Scientific Chemicals DL-1,4-Dithiothreitol, For Biochemistry, 1M solution in water

CAS: 3483-12-3 | C4H10O2S2 | 154.24 g/mol

Color Colorless
Physical Form Liquid
Chemical Name or Material DL-1, 4-Dithiothreitol
Grade Biochemical
Merck Index 15, 3419
Concentration 0.90 to 1.10M
Density 1.0400g/mL
Name Note 1M Solution in water, For molecular biology
CAS 7732-18-5
Health Hazard 3 GHS P Statement:
IF ON SKIN: Wash with plenty of soap and water.
Wear protective gloves/protective clothing/eye protection/face protection.
IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.

WARNING: The information provided on this web site was developed in compliance with European Union (EU) regulations and is correct to the best of our knowledge, information and belief at the date of its publication. The information given is designed only as a guide for safe handling and use. It is not to be considered as either a warranty or quality specification.
Health Hazard 2 GHS H Statement:
Causes serious eye irritation.
Causes skin irritation.
Packaging Glass bottle
Health Hazard 1 GHS Signal Word: Warning
Formula Weight 154.24
Specific Gravity 1.04
11

Boron standard solution, for AAS, 1 mg/ml B in water

CAS: 7440-42-8 | B | 10.81 g/mol

Molecular Weight (g/mol) 10.81
ChEBI CHEBI:27560
Solubility Soluble in water
Physical Form Solution
Chemical Name or Material Boron standard solution
Grade AAS
SMILES [B]
Merck Index 14, 1343
Concentration 997 to 1003 μg/mL of B in water (20°C)
InChI Key ZOXJGFHDIHLPTG-UHFFFAOYSA-N
PubChem CID 5462311
CAS 7440-42-8
MDL Number MFCD00134034 MFCD00151272
Packaging Plastic bottle
TSCA TSCA
RTECS Number ED7350000
IUPAC Name boron
Molecular Formula B
EINECS Number 231-151-2
Formula Weight 10.81
12

Tetrabutylammonium fluoride, 1M solution in THF, containing ca. 5% water

CAS: 429-41-4 | C16H36FN | 261.47 g/mol

Linear Formula [CH3(CH2)3]4NF
Molecular Weight (g/mol) 261.47
ChEBI CHEBI:51990
Chemical Name or Material Tetrabutylammonium fluoride
SMILES [F-].CCCC[N+](CCCC)(CCCC)CCCC
InChI Key FPGGTKZVZWFYPV-UHFFFAOYSA-M
Density 0.8870g/mL
PubChem CID 2724141
Name Note 1M Solution in THF, Containing ca 5% Water
Fieser 04,477; 05,645; 07,353; 08,467; 09,444; 10,378; 11,499; 12,458; 14,293; 15,168; 17,363
CAS 7732-18-5
Health Hazard 3 GHS P Statement
Keep away from heat/sparks/open flames/hot surfaces. - No smoking. IF ON SKIN (or hair): Take off immediately all contaminated clothing. Rinse skin with water/shower. Wear protective gloves/protective clothing/eye protection/face protection. IF SWALLOWED: rinse mouth. Do NOT induce vomiting. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. Immediately call a POISON CENTER or doctor/physician.
MDL Number MFCD00011747
Health Hazard 2 GHS H Statement
Causes severe skin burns and eye damage. Suspected of causing cancer. May cause respiratory irritation. Highly flammable liquid and vapor. May form explosive peroxides. May cause drowsiness or dizziness.
Flash Point −17°C
Packaging Glass bottle
Health Hazard 1 Danger
Synonym tetrabutylammonium fluoride,tbaf,tetrabutylazanium fluoride,tetrabutyl ammonium fluoride,tetra-n-butylammonium fluoride,tetrabutylamine, fluoride,n,n,n-tributylbutan-1-aminium fluoride,1-butanaminium, n,n,n-tributyl-, fluoride,n,n,n-tributyl-1-butanaminium fluoride,1-butanaminium, n,n,n-tributyl-, fluoride 1:1
TSCA TSCA
IUPAC Name tetrabutylazanium;fluoride
Molecular Formula C16H36FN
EINECS Number 207-057-2
Formula Weight 261.46
Specific Gravity 0.887
14

Perrhenic(VII)acid, 99.99%, (trace metal basis), 76.5% solution in water

CAS: 13768-11-1 Molecular Formula: HO4Re Molecular Weight (g/mol): 251.21 MDL Number: MFCD00011326 InChI Key: UGSFIVDHFJJCBJ-UHFFFAOYSA-M Synonym: perrhenic acid,hydroxy trioxo rhenium,perrhenic acid hreo4,rheniumoylol,hydrogen tetraoxorhenate vii,perrhenic vii acid,perrhenic acid solution,acmc-1bqjs,rhenate reo41-, hydrogen, t-4,rhenate reo41-, hydrogen 1:1 , t-4 PubChem CID: 83718 IUPAC Name: hydroxy(trioxo)rhenium SMILES: O[Re](=O)(=O)=O

PubChem CID 83718
CAS 13768-11-1
Molecular Weight (g/mol) 251.21
MDL Number MFCD00011326
SMILES O[Re](=O)(=O)=O
Synonym perrhenic acid,hydroxy trioxo rhenium,perrhenic acid hreo4,rheniumoylol,hydrogen tetraoxorhenate vii,perrhenic vii acid,perrhenic acid solution,acmc-1bqjs,rhenate reo41-, hydrogen, t-4,rhenate reo41-, hydrogen 1:1 , t-4
IUPAC Name hydroxy(trioxo)rhenium
InChI Key UGSFIVDHFJJCBJ-UHFFFAOYSA-M
Molecular Formula HO4Re