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 (23,946)

Spectroscopy Standards (5,665)

General Chemistry Solutions (5,023)

Matrix Blanks and Standardization Solutions (4,270)

Life Science Buffers (4,123)

Electrochemistry Buffers (2,333)

Environmental Testing Standards (1,865)

Electrochemistry Standards (1,229)

Karl Fischer Buffers and Reagents (467)

Isotope Standards (376)

Viscosity Standards (252)

Quality Control and Proficiency Samples (206)

Kjeldahl Buffers and Reagents (90)

Gel Filtration Standards (57)

Matrix Modifiers (29)

Osmolality Standards (12)

Smoke Point Reference (9)

Polarimetric Standards (6)

Narrow Results

special offers

Clearance (2)
New Lab Start-Up (812)
Offers (811)

special interests

Available on GSA/VA Contract (382)
SureTRACE (78)
Fast Shipping (451)
Greener Choice (95)
Production Products (191)
Science Education (205)
Small and Specialty Supplier (7,021)

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

346 – 360 of 44,341 results

346

Thermo Scientific Chemicals TRIS, 1.0M buffer soln., pH 8.5, 0.2 micron filtered

CAS: 77-86-1 Molecular Formula: C4H11NO3 Molecular Weight (g/mol): 121.136 MDL Number: MFCD00004679 InChI Key: LENZDBCJOHFCAS-UHFFFAOYSA-N PubChem CID: 6503 ChEBI: CHEBI:9754 IUPAC Name: 2-amino-2-(hydroxymethyl)propane-1,3-diol SMILES: C(C(CO)(CO)N)O

Pricing & Availability
Specifications

PubChem CID	6503
CAS	77-86-1
Molecular Weight (g/mol)	121.136
ChEBI	CHEBI:9754
MDL Number	MFCD00004679
SMILES	C(C(CO)(CO)N)O
IUPAC Name	2-amino-2-(hydroxymethyl)propane-1,3-diol
InChI Key	LENZDBCJOHFCAS-UHFFFAOYSA-N
Molecular Formula	C4H11NO3

347

Promotions Available

Potassium phosphate, monobasic, for HPLC

CAS: 7778-77-0 Molecular Formula: H2KO4P Molecular Weight (g/mol): 136.08 MDL Number: MFCD00011401 MFCD00147253 InChI Key: GNSKLFRGEWLPPA-UHFFFAOYSA-M IUPAC Name: potassium dihydrogen phosphate SMILES: [K+].OP(O)([O-])=O

Pricing & Availability
Specifications

CAS	7778-77-0
Molecular Weight (g/mol)	136.08
MDL Number	MFCD00011401 MFCD00147253
SMILES	[K+].OP(O)([O-])=O
IUPAC Name	potassium dihydrogen phosphate
InChI Key	GNSKLFRGEWLPPA-UHFFFAOYSA-M
Molecular Formula	H2KO4P

348

Thermo Scientific Chemicals TRIS, 1.0M buffer soln., pH 7.4

Pricing & Availability
Specifications

PubChem CID	6503
CAS	77-86-1
Molecular Weight (g/mol)	121.136
ChEBI	CHEBI:9754
MDL Number	MFCD00004679
SMILES	C(C(CO)(CO)N)O
IUPAC Name	2-amino-2-(hydroxymethyl)propane-1,3-diol
InChI Key	LENZDBCJOHFCAS-UHFFFAOYSA-N
Molecular Formula	C4H11NO3

349

R&D Systems™ ELISA Plate-coating Buffer

ELISA Plate-coating Buffer from the most referenced ELISA manufacturer. Highly validated for accurate quantitation and long-term reproducibility.

Pricing & Availability

350

Promotions Available

Tetrabutylammonium Hydroxide Titrant, 0.4M in Water, HPLC Grade

CAS: 2052-49-5 Molecular Formula: C16H37NO Molecular Weight (g/mol): 259.48 MDL Number: MFCD00009425 InChI Key: VDZOOKBUILJEDG-UHFFFAOYSA-M Synonym: tetrabutylammonium hydroxide,tetra-n-butylammonium hydroxide,tetrabutylazanium hydroxide,tetrabutylammoniumhydroxide,1-butanaminium, n,n,n-tributyl-, hydroxide,ammonium, tetrabutyl-, hydroxide,n,n,n-tributyl-1-butanaminium hydroxide,tetra n-butyl ammonium hydroxide,tetra-n-butyl ammonium hydroxide,1-butanaminium, n,n,n-tributyl-, hydroxide 1:1 PubChem CID: 2723671 SMILES: [OH-].CCCC[N+](CCCC)(CCCC)CCCC

Pricing & Availability
Specifications

PubChem CID	2723671
CAS	2052-49-5
Molecular Weight (g/mol)	259.48
MDL Number	MFCD00009425
SMILES	[OH-].CCCC[N+](CCCC)(CCCC)CCCC
Synonym	tetrabutylammonium hydroxide,tetra-n-butylammonium hydroxide,tetrabutylazanium hydroxide,tetrabutylammoniumhydroxide,1-butanaminium, n,n,n-tributyl-, hydroxide,ammonium, tetrabutyl-, hydroxide,n,n,n-tributyl-1-butanaminium hydroxide,tetra n-butyl ammonium hydroxide,tetra-n-butyl ammonium hydroxide,1-butanaminium, n,n,n-tributyl-, hydroxide 1:1
InChI Key	VDZOOKBUILJEDG-UHFFFAOYSA-M
Molecular Formula	C16H37NO

351

Potassium Hydroxide, 0.0100 N (N/100) in Isopropyl Alcohol, Ricca Chemical

CAS: 1310-58-3 Molecular Formula: HKO Molecular Weight (g/mol): 56.11 MDL Number: MFCD00003553 InChI Key: KWYUFKZDYYNOTN-UHFFFAOYSA-M Synonym: potassium hydroxide,caustic potash,potash lye,potassium hydrate,hydroxyde de potassium,potassa,potasse caustique,potassium hydroxide k oh,potassium hydroxide solution,caswell no. 693 PubChem CID: 14797 ChEBI: CHEBI:32035 IUPAC Name: potassium hydroxide SMILES: [OH-].[K+]

Pricing & Availability
Specifications

PubChem CID	14797
CAS	1310-58-3
Molecular Weight (g/mol)	56.11
ChEBI	CHEBI:32035
MDL Number	MFCD00003553
SMILES	[OH-].[K+]
Synonym	potassium hydroxide,caustic potash,potash lye,potassium hydrate,hydroxyde de potassium,potassa,potasse caustique,potassium hydroxide k oh,potassium hydroxide solution,caswell no. 693
IUPAC Name	potassium hydroxide
InChI Key	KWYUFKZDYYNOTN-UHFFFAOYSA-M
Molecular Formula	HKO

352

MES monohydrate, free acid, ≥99%, MP Biomedicals™

CAS: 4432-31-9 Molecular Formula: C6H13NO4S Molecular Weight (g/mol): 195.233 MDL Number: MFCD00149409 InChI Key: SXGZJKUKBWWHRA-UHFFFAOYSA-N Synonym: 2-[N-morpholino]ethanesulfonic acid PubChem CID: 78165 ChEBI: CHEBI:39005 IUPAC Name: 2-morpholin-4-ylethanesulfonic acid SMILES: C1COCCN1CCS(=O)(=O)O

Pricing & Availability
Specifications

PubChem CID	78165
CAS	4432-31-9
Molecular Weight (g/mol)	195.233
ChEBI	CHEBI:39005
MDL Number	MFCD00149409
SMILES	C1COCCN1CCS(=O)(=O)O
Synonym	2-[N-morpholino]ethanesulfonic acid
IUPAC Name	2-morpholin-4-ylethanesulfonic acid
InChI Key	SXGZJKUKBWWHRA-UHFFFAOYSA-N
Molecular Formula	C6H13NO4S

353

Buffer solution pH 7.00 (+/-0.024 @ 25oC) No Color Specpure NIST Traceable

CAS: 1336-21-6 | H5NO | 35.05 g/mol

Pricing & Availability
Specifications

Molecular Weight (g/mol)	35.05
ChEBI	CHEBI:18219
Color	Colorless
Traceability to NIST	Yes
Physical Form	Liquid
Chemical Name or Material	Buffer solution
Grade	Specpure
SMILES	N.O
InChI Key	VHUUQVKOLVNVRT-UHFFFAOYSA-N
PubChem CID	14923
CAS	1336-21-6
MDL Number	MFCD00066650
Solubility Information	pH 7.00 buffers are in solution form. Miscible with water.
TSCA	Yes
Recommended Storage	Ambient temperatures
Molecular Formula	H5NO
Odor	Odorless

354

Promotions Available

HEPES (Fine White Crystals/Molecular Biology), Fisher BioReagents™

Commonly used buffering agent | CAS: 7365-45-9 | C8H18N2O4S | 238.30 g/mol

Pricing & Availability
Specifications

Molecular Weight (g/mol)	238.30
ChEBI	CHEBI:42334
Color	White
Chemical Name or Material	HEPES
Grade	Molecular Biology
SMILES	OCCN1CCN(CCS(O)(=O)=O)CC1
Identification	Pass Test
DNase	DNase free
Merck Index	15, 4689
InChI Key	JKMHFZQWWAIEOD-UHFFFAOYSA-N
ChemAlert Storage Symbol	Gray
Assay Percent Range	≥99 %
PubChem CID	23831
Absorbance	0.01 max. (0.1M solution) at 280nm
Percent Purity	≥99%
CAS	7365-45-9
Protease	Protease free
Health Hazard 3	Emergency Overview Causes eye, skin, and respiratory tract irritation. Use personal protective equipment. Ensure adequate ventilation. Wash off immediately with plenty of water for at least 15 minutes. Obtain medical attention. Rinse immediately with plenty of water, also under the eyelids, for at least 15 minutes. Obtain medical attention. Move to fresh air. If breathing is difficult, give oxygen. Obtain medical attention. Do not induce vomiting. Obtain medical attention. Obtain medical attention. . NFPA Health:2 Flammability:1 Instability:1
MDL Number	MFCD00006158
Health Hazard 2	WARNING!
Solubility Information	Soluble in water
pH	5.0 to 6.5
Purity Grade Notes	DNase-, RNase- and Protease-Free
Recommended Storage	RT
Molecular Formula	C8H18N2O4S

355

Fluoride Standard, 0.1 ppm F^- (Premixed with TISAB), Ricca Chemical

CAS: 7681-49-4 Molecular Formula: FNa Molecular Weight (g/mol): 41.99 MDL Number: MFCD00003524 InChI Key: PUZPDOWCWNUUKD-UHFFFAOYSA-M PubChem CID: 5235 ChEBI: CHEBI:28741 IUPAC Name: sodium fluoride SMILES: [F-].[Na+]

Pricing & Availability
Specifications

PubChem CID	5235
CAS	7681-49-4
Molecular Weight (g/mol)	41.99
ChEBI	CHEBI:28741
MDL Number	MFCD00003524
SMILES	[F-].[Na+]
IUPAC Name	sodium fluoride
InChI Key	PUZPDOWCWNUUKD-UHFFFAOYSA-M
Molecular Formula	FNa

356

Ammonia, ca. 7N solution in methanol, AcroSeal™

CAS: 7664-41-7 | H3N | 17.03 g/mol

Pricing & Availability
Specifications

Linear Formula	NH₃
Molecular Weight (g/mol)	17.03
ChEBI	CHEBI:16134
Color	Colorless to Yellow
Physical Form	Liquid
Chemical Name or Material	Ammonia
SMILES	N
Merck Index	15, 488
Concentration	6.0 to 7.5N
InChI Key	QGZKDVFQNNGYKY-UHFFFAOYSA-N
Density	0.7700g/mL
PubChem CID	222
Name Note	7N solution in methanol
CAS	67-56-1
Health Hazard 3	GHS P Statement: IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician. Wear protective gloves/protective clothing/eye protection/face protection. Call a POISON CENTER or doctor/physician if you feel unwell. IF ON SKIN: Gently wash with plenty of soap and water. IF SWALLOWED: rinse mouth. Do NOT induce vomiting. Wear 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. Immediately call a POISON CENTER or doctor/physician. IF exposed: Call a POISON CENTER or doctor/physician. IF INHALED: Remove victim to fresh air and keep at rest in a position comfortable for breathing. Avoid release to the environment. Keep away from heat/sparks/open flames/hot surfaces. - No smoking. Ground/Bond container and receiving equipment. 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	MFCD00011418
Health Hazard 2	GHS H Statement: Toxic if swallowed. Causes severe skin burns and eye damage. Toxic in contact with skin. Causes damage to organs. Fatal if inhaled. Highly flammable liquid and vapor.
Flash Point	14°C
Packaging	AcroSeal™ Glass Bottle
Health Hazard 1	GHS Signal Word: Danger
Synonym	ammonia,ammonia gas,spirit of hartshorn,nitro-sil,ammoniakgas,ammonia anhydrous,anhydrous ammonia,ammonia, anhydrous,ammoniak,am-fol
IUPAC Name	azane
Molecular Formula	H3N
Formula Weight	17.03
Specific Gravity	0.77

357

Promotions Available

n-Butyllithium, 2.7M solution in toluene, AcroSeal™

CAS: 109-72-8 Molecular Formula: C4H9Li Molecular Weight (g/mol): 64.06 MDL Number: MFCD00009414 InChI Key: MZRVEZGGRBJDDB-UHFFFAOYSA-N Synonym: n-butyllithium,lithium, butyl,butyllithium,butyl lithium,n-butyl lithium,lithium butane,n-buli,buli,libu,unii-09w9a6b8zc PubChem CID: 61028 IUPAC Name: butyllithium SMILES: [Li]CCCC

Pricing & Availability
Specifications

PubChem CID	61028
CAS	109-72-8
Molecular Weight (g/mol)	64.06
MDL Number	MFCD00009414
SMILES	[Li]CCCC
Synonym	n-butyllithium,lithium, butyl,butyllithium,butyl lithium,n-butyl lithium,lithium butane,n-buli,buli,libu,unii-09w9a6b8zc
IUPAC Name	butyllithium
InChI Key	MZRVEZGGRBJDDB-UHFFFAOYSA-N
Molecular Formula	C4H9Li

358

Promotions Available

MOPS sodium salt, 98%

CAS: 71119-22-7 Molecular Formula: C7H14NNaO4S Molecular Weight (g/mol): 231.242 MDL Number: MFCD00064350 InChI Key: MWEMXEWFLIDTSJ-UHFFFAOYSA-M Synonym: 3-(4-Morpholino)propanesulfonic acid sodium salt PubChem CID: 3859613 IUPAC Name: sodium;3-morpholin-4-ylpropane-1-sulfonate SMILES: C1COCCN1CCCS(=O)(=O)[O-].[Na+]

Pricing & Availability
Specifications

PubChem CID	3859613
CAS	71119-22-7
Molecular Weight (g/mol)	231.242
MDL Number	MFCD00064350
SMILES	C1COCCN1CCCS(=O)(=O)[O-].[Na+]
Synonym	3-(4-Morpholino)propanesulfonic acid sodium salt
IUPAC Name	sodium;3-morpholin-4-ylpropane-1-sulfonate
InChI Key	MWEMXEWFLIDTSJ-UHFFFAOYSA-M
Molecular Formula	C7H14NNaO4S

359

Polyseed™, For BOD, Reagent Grade, LabChem™

Pricing & Availability

360

Promotions Available

Vinylmagnesium bromide, 0.7M solution in THF, AcroSeal™

CAS: 1826-67-1 Molecular Formula: C2H3BrMg Molecular Weight (g/mol): 131.26 MDL Number: MFCD00000042 InChI Key: XHHHAXOHMKAOSL-UHFFFAOYSA-M Synonym: vinylmagnesium bromide,bromo ethenyl magnesium,vinyl magnesium bromide,magnesium, bromoethenyl,vinylmagnesium bromide solution,vinylmagnesium bromide solution, 1.0 m in thf,bromovinylmagnesium,bromo vinyl magnesium,vinyl magnesiumbromide,grignard reagent PubChem CID: 74584 SMILES: Br[Mg]C=C

Pricing & Availability
Specifications

PubChem CID	74584
CAS	1826-67-1
Molecular Weight (g/mol)	131.26
MDL Number	MFCD00000042
SMILES	Br[Mg]C=C
Synonym	vinylmagnesium bromide,bromo ethenyl magnesium,vinyl magnesium bromide,magnesium, bromoethenyl,vinylmagnesium bromide solution,vinylmagnesium bromide solution, 1.0 m in thf,bromovinylmagnesium,bromo vinyl magnesium,vinyl magnesiumbromide,grignard reagent
InChI Key	XHHHAXOHMKAOSL-UHFFFAOYSA-M
Molecular Formula	C2H3BrMg

Buffers and Standards

Filtered Search Results

Narrow Results

Polyseed™, For BOD, Reagent Grade, LabChem™ GSA/VA ContractAvailable on GSA/VA contract for Federal Government customers.Learn More

Polyseed™, For BOD, Reagent Grade, LabChem™