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

Chromatography Standards (23,966)

Spectroscopy Standards (5,660)

General Chemistry Solutions (5,022)

Matrix Blanks and Standardization Solutions (4,275)

Life Science Buffers (4,116)

Electrochemistry Buffers (2,317)

Environmental Testing Standards (1,867)

Electrochemistry Standards (1,229)

Karl Fischer Buffers and Reagents (467)

Isotope Standards (376)

Viscosity Standards (251)

Quality Control and Proficiency Samples (206)

Kjeldahl Buffers and Reagents (90)

Gel Filtration Standards (57)

Matrix Modifiers (29)

Osmolality Standards (12)

Smoke Point Reference (10)

Polarimetric Standards (6)

Narrow Results

special offers

Clearance (2)
New Lab Start-Up (812)
Offers (815)

special interests

Available on GSA/VA Contract (382)
SureTRACE (78)
Fast Shipping (452)
Greener Choice (96)
Production Products (187)
Science Education (205)
Small and Specialty Supplier (7,020)

Grade

AAS (66)
ACS (194)
ACS Reagent (25)
ACS/ASTM E 200/AOAC/EPA (7)
ACS/ASTM E 200/AOAC/USP Volumetric (5)
APHA/EPA (5)
APHA/Hazen (5)

Show all

Molecular Weight (g/mol)

0.00 (1)
10.81 (14)
100.09 (33)
100.117 g/mol (1)
100.12 (1)
100.121 (1)
100.15 (1)

Show all

Quantity

0.1 mol (1)
0.5 L (1)
0.5 mL (15)
0.5 mol (1)
1 Bottle (5)
1 Box (1)
1 Ea. (5)

Show all

Percent Purity

≥ 4400 Units/mg (Nystatin) ≥ 5000 Units/mg (Nystatin) (1) (8)
≥ 85.0 % (1)
≥14% (BF3) (1)
≥30% (RT) (1)
≥30% (titration) (1)
≥35% (RT) (1)
≥40% (3)

Show all

pH

≥12 to ≤14 (6)
>11.5 (1)
>12 (44)
>13 (97)
>8 (1)
<0.5 (3)
<1 (97)

Show all

Solvent or Matrix

#2 Diesel Fuel (12)
10% HCl (19)
10% HCl/1% HNO₃ (1)
10% HNO3 (13)
15% HCl (3)
15% HNO₃ (2)
2% HCl (29)

Show all

Concentration

≈0.000027 M (3)
≈0.0035 M (3)
≥30% (1)
≤0.1% in nitric acid (1)
≤2.5% KCl (T) (8)
0.00017 M (3)
0.001 M KCl (1)

Show all

Physical Form

Aqueous Solution (37)
Capsule (11)
Chemvelope (1)
Clear Liquid (1)
Clear Liquid at 20°C (2)
Colorless Liquid (1)
Crystalline (22)

Show all

Solution Type

Antigen Retrieval Reagent (1)
Aqueous (3)
Buffer (588)
Buffer, Storage (4)
Calibration (8)
Cleaning, Storage, pH Buffer (15)
Colored pH Buffer (43)

Show all

For Use With (Application)

Accurate calibrations and NIST traceability (1)
Accurate calibrations and NIST traceability, laboratory and bench analysis (2)
Accurate calibrations and NIST traceability, portable and field analysis (1)
Accurate pH calibrations and NIST traceability, laboratory and bench analysis (8)
Accurate pH calibrations and NIST traceability, portable and field analysis (6)
Accurate, reproducible pH calibrations (15)
Agarose Gel Electrophoresis, Polyacrylamide Gel Electrophoresis (10)

Show all

Search Within Results

811 – 825 of 44,332 results

811

Buffer solution pH 4, Phthalate buffer, traceable to NIST, ready to use

CAS: 877-24-7 | C₈H₅KO₄

Pricing & Availability
Specifications

CAS	7487-94-7
MDL Number	MFCD00217672
Solubility Information	Solubility in water: miscible.
Physical Form	Liquid
Chemical Name or Material	Buffer solution pH 4
Concentration	1.0% (Potassium hydrogen phthalate)
Molecular Formula	C₈H₅KO₄
Formula Weight	204.22

812

Barium chloride, 10% w/v aq. soln.

CAS: 10361-37-2 Molecular Formula: BaCl2 Molecular Weight (g/mol): 208.23 MDL Number: MFCD00003445 InChI Key: WDIHJSXYQDMJHN-UHFFFAOYSA-L Synonym: barium chloride,barium dichloride,barium chloride solution,ccris 2286,barium chloride, anhydrous,barium chloride, ultra dry,bariumchlorid,dichlorobarium,dsstox_cid_24508 PubChem CID: 25204 ChEBI: CHEBI:63317 IUPAC Name: barium(2+);dichloride SMILES: [Cl-].[Cl-].[Ba++]

Pricing & Availability
Specifications

PubChem CID	25204
CAS	10361-37-2
Molecular Weight (g/mol)	208.23
ChEBI	CHEBI:63317
MDL Number	MFCD00003445
SMILES	[Cl-].[Cl-].[Ba++]
Synonym	barium chloride,barium dichloride,barium chloride solution,ccris 2286,barium chloride, anhydrous,barium chloride, ultra dry,bariumchlorid,dichlorobarium,dsstox_cid_24508
IUPAC Name	barium(2+);dichloride
InChI Key	WDIHJSXYQDMJHN-UHFFFAOYSA-L
Molecular Formula	BaCl2

813

Pyridine-Barbituric Acid Reagent, For Cyanide, Certified, LabChem™

Pricing & Availability
Specifications

Linear Formula	C₅H₅N
Color	Amber
Physical Form	Liquid
Chemical Name or Material	Pyridine-Barbituric Acid Reagent
Identification	Passes Test
Grade	Certified
Name Note	For Cyanide
CAS	7647-01-0
Decomposition Information	Nitrogen oxides; Carbon monoxide; Carbon dioxide; Hydrogen chloride
Health Hazard 2	GHS H Statement Harmful if swallowed. Causes skin irritation. Causes serious eye irritation. Toxic to aquatic life.
Packaging	Amber Glass
Solubility Information	Soluble in water
Health Hazard 1	Warning
Recommended Storage	Refrigerate
Formula Weight	79.1
CAS Max %	2.4
Suitability	Passes Test

814

Trimethylamine, pure, 7.3M (50 wt.%) aqueous solution

CAS: 75-50-3 | C3H9N | 59.11 g/mol

Pricing & Availability
Specifications

Boiling Point	30.0°C to 100.0°C
Linear Formula	(CH₃)₃N
Molecular Weight (g/mol)	59.11
ChEBI	CHEBI:18139
Color	Colorless
Physical Form	Liquid
Chemical Name or Material	Trimethylamine
Grade	Pure
SMILES	CN(C)C
InChI Key	GETQZCLCWQTVFV-UHFFFAOYSA-N
Density	0.8600g/mL
PubChem CID	1146
Percent Purity	48 to 52% (total base)
CAS	7732-18-5
MDL Number	MFCD00008327
Flash Point	−45°C
Solubility Information	Solubility in water: freely soluble. Other solubilities: soluble in alcohol, ether, benzene, toluene,, xylene, ethylbenzene and chloroform
Health Hazard 1	Danger
Synonym	trimethylamine,methanamine, n,n-dimethyl,dimethylmethaneamine,n-trimethylamine,trimethylamine solution,ch3 3n,trimethyl amine,trimethylamin,trimethyl-amine,fema number 3241
IUPAC Name	N,N-dimethylmethanamine
Molecular Formula	C3H9N
Formula Weight	59.11
Specific Gravity	0.86
Melting Point	-2.0°C

815

Promotions Available

Fehling A solution

CAS: 7758-98-7 Molecular Formula: CuO4S Molecular Weight (g/mol): 159.602 MDL Number: MFCD00010981 InChI Key: ARUVKPQLZAKDPS-UHFFFAOYSA-L Synonym: copper sulfate,copper ii sulfate,cupric sulfate anhydrous,copper sulphate,copper 2+ sulfate,blue stone,copper monosulfate,copper ii sulfate, anhydrous,hylinec,trinagle PubChem CID: 24462 ChEBI: CHEBI:23414 IUPAC Name: copper;sulfate SMILES: [O-]S(=O)(=O)[O-].[Cu+2]

Pricing & Availability
Specifications

PubChem CID	24462
CAS	7758-98-7
Molecular Weight (g/mol)	159.602
ChEBI	CHEBI:23414
MDL Number	MFCD00010981
SMILES	[O-]S(=O)(=O)[O-].[Cu+2]
Synonym	copper sulfate,copper ii sulfate,cupric sulfate anhydrous,copper sulphate,copper 2+ sulfate,blue stone,copper monosulfate,copper ii sulfate, anhydrous,hylinec,trinagle
IUPAC Name	copper;sulfate
InChI Key	ARUVKPQLZAKDPS-UHFFFAOYSA-L
Molecular Formula	CuO4S

816

Potassium bis(trimethylsilyl)amide, 0.7M (15 wt.%) solution in toluene, AcroSeal™

CAS: 40949-94-8 | C6H18KNSi2 | 199.485 g/mol

Pricing & Availability
Specifications

Linear Formula	[(CH₃)₃Si]₂NK
Molecular Weight (g/mol)	199.485
Color	Yellow
Physical Form	Liquid
Chemical Name or Material	Potassium bis(trimethylsilyl)amide
SMILES	C[Si](C)(C)[N-][Si](C)(C)C.[K+]
Concentration	0.6 to 0.8M (Total base)
InChI Key	IUBQJLUDMLPAGT-UHFFFAOYSA-N
Density	0.8760g/mL
PubChem CID	3251421
Name Note	0.5M solution in toluene
Percent Purity	0.6 to 0.8 M (Total base)
CAS	108-88-3
Health Hazard 3	GHS P Statement IF SWALLOWED: Rinse mouth. Do NOT induce vomiting. Obtain special instructions before use. 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. Keep away from heat/sparks/open flames/hot surfaces. - No smoking. Avoid release to the environment.
MDL Number	MFCD00010330
Health Hazard 2	GHS P Statement Causes severe skin burns and eye damage. May be fatal if swallowed and enters airways. May cause drowsiness or dizziness. May cause damage to organs through prolonged or repeated exposure. Suspected of damaging the unborn child. Highly flammable liquid and vapor. Suspected of causing cancer. Suspected of causing genetic defects if inhaled. Harmful to aquatic life with long lasting effects.
Health Hazard 1	Danger
Synonym	potassium bis trimethylsilyl amide,khmds,potassium hexamethyldisilazide,hexamethyldisilazane potassium salt,potassium bis trimethylsilyl azanide,potassium bis trimethylsilyl amide 1m sol. in thf,potassiumbis trimethylsilyl amide,hexamethyldislazane potassium salt,1,1,1,3,3,3-hexamethyldisilazane potassium salt,potassium bis-trimethylsilylamide
IUPAC Name	potassium;bis(trimethylsilyl)azanide
Molecular Formula	C6H18KNSi2
Formula Weight	199.49

817

Hydrogen chloride, 5 to 6M soln. in 2-propanol, pure

CAS: 7647-01-0 Molecular Formula: ClH Molecular Weight (g/mol): 36.46 MDL Number: MFCD00011324 MFCD00792839 InChI Key: VEXZGXHMUGYJMC-UHFFFAOYSA-N Synonym: hydrochloric acid,hydrogen chloride,muriatic acid,chlorohydric acid,acide chlorhydrique,chlorwasserstoff,spirits of salt,hydrogen chloride hcl,anhydrous hydrochloric acid,chloorwaterstof PubChem CID: 313 ChEBI: CHEBI:17883 SMILES: Cl

Pricing & Availability
Specifications

PubChem CID	313
CAS	7647-01-0
Molecular Weight (g/mol)	36.46
ChEBI	CHEBI:17883
MDL Number	MFCD00011324 MFCD00792839
SMILES	Cl
Synonym	hydrochloric acid,hydrogen chloride,muriatic acid,chlorohydric acid,acide chlorhydrique,chlorwasserstoff,spirits of salt,hydrogen chloride hcl,anhydrous hydrochloric acid,chloorwaterstof
InChI Key	VEXZGXHMUGYJMC-UHFFFAOYSA-N
Molecular Formula	ClH

818

Hydrogen Peroxide, Certified, >30% (w/w), LabChem™

CAS: 7722-84-1 Molecular Formula: H2O2 Molecular Weight (g/mol): 34.014 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

Pricing & Availability
Specifications

PubChem CID	784
CAS	7722-84-1
Molecular Weight (g/mol)	34.014
ChEBI	CHEBI:16240
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

819

Heavy Metals, plasma standard solution, Specpure™, Ag, As, Ba, Cd, Cr, Hg, Pb, Se @ 100μg/mL

Pricing & Availability
Specifications

Solubility	Miscible with water
Physical Form	Liquid
UN Number	UN3264
Chemical Name or Material	Heavy Metals, plasma standard solution
Grade	Specpure
Concentration	Matrix: 5% HNO₃
Name Note	Ag, As, Ba, Cd, Cr, Hg, Pb, Se @ 100μg/mL
MDL Number	MFCD02091713
Health Hazard 2	May be corrosive to metals, Causes severe skin burns and eye damage
Health Hazard 1	Corrosive to metals (category 1), Skin corrosion/irritation (category 1)
DOT Information	Transport Hazard Class: 8; Packing Group: III; Proper Shipping Name: CORROSIVE LIQUID, ACIDIC, INORGANIC, N.O.S.
TSCA	Yes
Recommended Storage	Ambient temperatures
EINECS Number	231-714-2

820

Iron AA Standard, Certified, 1000ppm ±5ppm (1mL = 1mg Fe), LabChem™

CAS: 7439-89-6 Molecular Formula: Fe Molecular Weight (g/mol): 55.85 MDL Number: MFCD00010999 InChI Key: XEEYBQQBJWHFJM-UHFFFAOYSA-N PubChem CID: 23925 ChEBI: CHEBI:82664 IUPAC Name: iron SMILES: [Fe]

Pricing & Availability
Specifications

PubChem CID	23925
CAS	7439-89-6
Molecular Weight (g/mol)	55.85
ChEBI	CHEBI:82664
MDL Number	MFCD00010999
SMILES	[Fe]
IUPAC Name	iron
InChI Key	XEEYBQQBJWHFJM-UHFFFAOYSA-N
Molecular Formula	Fe

821

Buffer solution, pH 9.18 (+/-0.024 @ 25oC), No Color, Specpure, NIST Traceable

Pricing & Availability
Specifications

Name Note	NIST Traceable
Health Hazard 3	P234-P390
MDL Number	MFCD00147253
Physical Form	Liquid
Health Hazard 1	H290
Chemical Name or Material	Buffer solution, pH 9.18 (±0.01 at 25°C)
Grade	Specpure
TSCA	Yes
Recommended Storage	Ambient temperatures

822

Chloride Color Reagent, Ricca Chemical

For Chloride Determination by the Automated Ferricyanide Method

Pricing & Availability
Specifications

CAS	9002-92-0
Color	Orange-Yellow
Physical Form	Liquid
Packaging	Amber Glass Bottle
CAS Min %	0.05
Chemical Name or Material	Chloride Color Reagent
Grade	Laboratory
CAS Max %	0.05

823

Thermo Scientific Chemicals TAE (10X), TRIS + acetate + EDTA

TAE (10X), TRIS + acetate + EDTA is a buffer composed of Tris, acetate, and EDTA components and is used in electrophoresis of nucleic acids in agarose and polyacrylamide gels.

Pricing & Availability
Specifications

MDL Number	MFCD00236357
Solubility Information	Fully miscible.
Packaging	Plastic bottle
Physical Form	Liquid
Chemical Name or Material	TAE (10X)
TSCA	Yes
Recommended Storage	Ambient temperatures

824

VeriSpec™ Multi-Element Environmental Standard 26, Ricca Chemical

100 ppm: Ag, Al, As, Ba, Be, Ca, Cd, Co, Cr, Cu, Fe, K, Mg, Mn, Mo, Na, Ni, Pb, Sb, Se, Sn, Sr, Ti,

Pricing & Availability

825

Thermo Scientific Chemicals Phosphate-buffered saline (PBS, 10X), pH 7.6

Helps to maintain a constant pH

Pricing & Availability
Specifications

Physical Form	Liquid
pH	7.6
Chemical Name or Material	Phosphate Buffered Saline (PBS)
Recommended Storage	Ambient temperatures
Concentration	10 X

Buffers and Standards

Filtered Search Results

Narrow Results

Hydrogen Peroxide, Certified, >30% (w/w), LabChem™ GSA/VA ContractAvailable on GSA/VA contract for Federal Government customers.Learn More

Iron AA Standard, Certified, 1000ppm ±5ppm (1mL = 1mg Fe), LabChem™ GSA/VA ContractAvailable on GSA/VA contract for Federal Government customers.Learn More

Hydrogen Peroxide, Certified, >30% (w/w), LabChem™

Iron AA Standard, Certified, 1000ppm ±5ppm (1mL = 1mg Fe), LabChem™