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)

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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)

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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)

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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)

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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)

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pH

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

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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)

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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)

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Physical Form

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

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Solution Type

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

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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)

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Search Within Results

301 – 315 of 44,341 results

301

Nitrite Nitrogen Standard, 1000 ppm N (3285 ppm NO₂^-), Ricca Chemical

CAS: 7758-09-0 Molecular Formula: KNO2 Molecular Weight (g/mol): 85.10 MDL Number: MFCD00011408 InChI Key: BXNHTSHTPBPRFX-UHFFFAOYSA-M PubChem CID: 516910 IUPAC Name: potassium nitrite SMILES: [K+].[O-]N=O

Pricing & Availability
Specifications

PubChem CID	516910
CAS	7758-09-0
Molecular Weight (g/mol)	85.10
MDL Number	MFCD00011408
SMILES	[K+].[O-]N=O
IUPAC Name	potassium nitrite
InChI Key	BXNHTSHTPBPRFX-UHFFFAOYSA-M
Molecular Formula	KNO2

302

Thermo Scientific Chemicals TRIS-buffered saline (TBS, 10X) pH 7.4

CAS: 77-86-1 Molecular Formula: C4H11NO3 Molecular Weight (g/mol): 121.136 MDL Number: MFCD00132476 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	MFCD00132476
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

303

Thermo Scientific Chemicals Phosphate-buffered saline (DPBS, 1X), Dulbecco's formula, without calcium, without magnesium

Pricing & Availability
Specifications

Packaging	Plastic bottle
Physical Form	Liquid
Recommended Storage	Ambient temperatures

304

Cyanide Standard, Certified, 1000ppm ±10ppm (1mL = 1mg CN^-), LabChem™

CAS: 151-50-8 Molecular Formula: CKN Molecular Weight (g/mol): 65.116 InChI Key: NNFCIKHAZHQZJG-UHFFFAOYSA-N PubChem CID: 9032 IUPAC Name: potassium;cyanide SMILES: [C-]#N.[K+]

Pricing & Availability
Specifications

PubChem CID	9032
CAS	151-50-8
Molecular Weight (g/mol)	65.116
SMILES	[C-]#N.[K+]
IUPAC Name	potassium;cyanide
InChI Key	NNFCIKHAZHQZJG-UHFFFAOYSA-N
Molecular Formula	CKN

305

Buffer, Reference Standard, pH 11.00 ± 0.01 at 25°C, Ricca Chemical

Pricing & Availability
Specifications

For Use With (Equipment)	pH Meter and Electrode
Physical Form	Liquid
pH	11
CAS Min %	0.11
Concentration	1X
For Use With (Application)	Calibration
Solution Type	pH Buffer
CAS Max %	0.11

306

Borane-tetrahydrofuran complex, 1M solution in THF, Stabilized, AcroSeal™

CAS: 14044-65-6 | C4H11BO | 85.94 g/mol

Pricing & Availability
Specifications

Molecular Weight (g/mol)	85.94
InChI Key	RMCYTHFAWCWRFA-UHFFFAOYSA-N
Density	0.8760g/mL
Treatment(s)	Stabilized
PubChem CID	11062302
Name Note	1M solution in tetrahydrofuran, stabilized
Fieser	01,199; 02,106; 03,76; 04,124; 05,184; 06,161; 07,89; 12,65; 17,101
Formula Weight	85.94
Color	Colorless
Physical Form	Liquid
Chemical Name or Material	Borane-tetrahydrofuran complex
SMILES	B.C1CCOC1
Merck Index	15, 1336
Concentration	0.96 to 1.08M
CAS	109-99-9
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. Handle under inert gas. Protect from moisture. 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	MFCD00012429
Health Hazard 2	GHS H Statement May cause respiratory irritation. Causes serious eye damage. In contact with water releases flammable gases which may ignite spontaneously. Causes skin irritation. Harmful if swallowed. Highly flammable liquid and vapour. Suspected of causing cancer. Reacts violently with water. May form explosive peroxides. May cause drowsiness or dizziness.
Flash Point	−22°C
Packaging	AcroSeal™ Glass bottle
Solubility Information	Solubility in water: reacts.
Health Hazard 1	Danger
Synonym	borane-tetrahydrofuran complex,tetrahydrofuran borane,bh3.thf,borane tetrahydrofuran complex solution,borane-d3-thf complex solution,borane-tetrahydrofuran,unii-5ear4err1l,oxolane borane,boron; oxolane,borane thf
TSCA	TSCA
IUPAC Name	oxolane borane
Molecular Formula	C4H11BO
EINECS Number	237-881-8
Specific Gravity	0.876

307

Titration (TAN) Solvent, Certified, LabChem™

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308

Promotions Available

Phenol/Chloroform/Isoamyl alcohol (25:24:1), stabilized, saturated with 100 mM Tris-EDTA to pH 8.0, for molecular

Phenol-Chloroform-Isoamyl alcohol mixture in the ratio of 25:24:1 (v/v/v), CAS # 136112-00-0, 67-66-3, 123-51-3, is a solution used in the purification of nucleic acids. | CAS: 136112-00-0 | C₆H₆O

Pricing & Availability
Specifications

Color	Yellow to Orange
Physical Form	Solution
UN Number	2927
Chemical Name or Material	Phenol/Chloroform/Isoamyl alcohol (25:24:1), stabilized, saturated with 100 mM Tris-EDTA to pH 8.0
Grade	Molecular Biology
Merck Index	14, 7241
Density	1.2800g/mL
Treatment(s)	Stabilized
Name Note	DNase, RNase and Protease Free
CAS	123-51-3
MDL Number	MFCD00133763
Health Hazard 2	Suspected of causing genetic defects, Suspected of damaging the unborn child, Causes damage to organs through prolonged or repeated exposure, Causes severe skin burns and eye damage, May cause drowsiness or dizziness, Suspected of causing cancer, Repeated exposure may cause skin dryness or cracking, Toxic if swallowed, in contact with skin or if inhaled
pH	7.8 to 8.2 (25°C)
Packaging	Glass bottle
Health Hazard 1	Germ cell mutagenicity (category 2), Reproductive toxicity (category 2), Specific target organ toxicity after repeated exposure (category 1), Skin corrosion/irritation (category 1), Specific target organ toxicity after single exposure (category 3), Carcinogenicity (category 2), Acute toxicity (category 3)
Molecular Formula	C₆H₆O
Formula Weight	94.11
Specific Gravity	1.28

309

Water Standard Oven 1%, solid standard for KF oven method apura, MilliporeSigma™

Certified reference material for coulometric and volumetric Karl Fischer oven water determinations, featuring a 1% water content for high accuracy and precision.

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310

Water Hardness Buffer, Odorless, Ricca Chemical

Pricing & Availability
Specifications

Name Note	Odorless
CAS	7791-18-6
Color	Colorless to Yellow
Packaging	Natural Poly Bottle
Physical Form	Liquid
CAS Min %	0.18
Chemical Name or Material	Water Hardness Buffer
Grade	Laboratory
Concentration	1X
For Use With (Application)	Water Analysis
Solution Type	Buffer
CAS Max %	0.19

311

Hydrochloric acid, 0.01N Standardized Solution

CAS: 7647-01-0 Molecular Formula: ClH Molecular Weight (g/mol): 36.46 MDL Number: MFCD00011324 MFCD00792839 InChI Key: VEXZGXHMUGYJMC-UHFFFAOYSA-N 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
InChI Key	VEXZGXHMUGYJMC-UHFFFAOYSA-N
Molecular Formula	ClH

312

Tetrabutylammonium hydroxide, 1M solution in methanol

CAS: 2052-49-5 | C16H37NO | 259.48 g/mol

Pricing & Availability
Specifications

Linear Formula	[CH₃(CH₂)₃]₄NOH
Molecular Weight (g/mol)	259.48
InChI Key	VDZOOKBUILJEDG-UHFFFAOYSA-M
Density	0.9100g/mL
PubChem CID	2723671
Name Note	1M Solutionin Methanol
RTECS Number	BS5425000
Formula Weight	259.46
Melting Point	-98.0°C
Boiling Point	65.0°C
Chemical Name or Material	Tetrabutylammonium hydroxide
SMILES	[OH-].CCCC[N+](CCCC)(CCCC)CCCC
CAS	67-56-1
Health Hazard 3	GHS P Statement: 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. IF INHALED: Remove victim to fresh air and keep at rest in a position comfortable for breathing. 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	MFCD00009425
Health Hazard 2	GHS H Statement: Toxic if swallowed. Toxic in contact with skin. Toxic if inhaled. Causes severe skin burns and eye damage. Causes damage to organs. Highly flammable liquid and vapor.
Flash Point	12°C
Packaging	Plastic bottle
Solubility Information	Solubility in water: soluble.
Health Hazard 1	Danger
Refractive Index	1.3775
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
TSCA	TSCA
Molecular Formula	C16H37NO
EINECS Number	218-147-6
Specific Gravity	0.91

313

DPD Indicator Solution, for Residual Chlorine Analysis, Ricca Chemical

For Analysis of Residual Chlorine Analysis

Pricing & Availability
Specifications

CAS	6381-92-6
Packaging	Amber Glass Bottle
CAS Min %	0.02
Chemical Name or Material	DPD Indicator Solution
Grade	Laboratory
Recommended Storage	Refrigerate (2°C - 8°C)
CAS Max %	0.02

314

Glucose-Glutamic Acid Solution, Standard Check Solution for Biochemical Oxygen Demand (BOD), Ricca Chemical

CAS: 50-99-7 Molecular Formula: C6H12O6 Molecular Weight (g/mol): 180.156 InChI Key: GZCGUPFRVQAUEE-SLPGGIOYSA-N PubChem CID: 107526 ChEBI: CHEBI:42758 IUPAC Name: (2R,3S,4R,5R)-2,3,4,5,6-pentahydroxyhexanal SMILES: C(C(C(C(C(C=O)O)O)O)O)O

Pricing & Availability
Specifications

PubChem CID	107526
CAS	50-99-7
Molecular Weight (g/mol)	180.156
ChEBI	CHEBI:42758
SMILES	C(C(C(C(C(C=O)O)O)O)O)O
IUPAC Name	(2R,3S,4R,5R)-2,3,4,5,6-pentahydroxyhexanal
InChI Key	GZCGUPFRVQAUEE-SLPGGIOYSA-N
Molecular Formula	C6H12O6

315

TISAB II, For Fluoride, Certified, LabChem™

Pricing & Availability
Specifications

Linear Formula	CH₃COOH
Color	Colorless
Physical Form	Liquid
Traceability to NIST	Traceable to NIST
Chemical Name or Material	TISAB II
Identification	Passes Test
Grade	Certified
Name Note	For Fluoride
CAS	125572-95-4
Decomposition Information	Carbon monoxide; Carbon dioxide
Health Hazard 2	GHS H Statement Causes skin irritation. Causes serious eye irritation.
pH	5.3 to 5.5
Solubility Information	Soluble in water
Health Hazard 1	Warning
Recommended Storage	Room Temperature
Formula Weight	60.05
CAS Max %	0.4

Buffers and Standards

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Cyanide Standard, Certified, 1000ppm ±10ppm (1mL = 1mg CN-), LabChem™ GSA/VA ContractAvailable on GSA/VA contract for Federal Government customers.Learn More

Water Standard Oven 1%, solid standard for KF oven method apura, MilliporeSigma™ GSA/VA ContractAvailable on GSA/VA contract for Federal Government customers.Learn More

Cyanide Standard, Certified, 1000ppm ±10ppm (1mL = 1mg CN^-), LabChem™

Water Standard Oven 1%, solid standard for KF oven method apura, MilliporeSigma™