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 (24,310)

Spectroscopy Standards (5,752)

General Chemistry Solutions (5,095)

Matrix Blanks and Standardization Solutions (4,313)

Life Science Buffers (4,205)

Electrochemistry Buffers (2,364)

Environmental Testing Standards (1,894)

Electrochemistry Standards (1,249)

Karl Fischer Buffers and Reagents (467)

Isotope Standards (380)

Viscosity Standards (258)

Quality Control and Proficiency Samples (184)

Kjeldahl Buffers and Reagents (90)

Gel Filtration Standards (59)

Matrix Modifiers (29)

Osmolality Standards (12)

Smoke Point Reference (10)

Polarimetric Standards (6)

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Available on GSA/VA Contract (381)
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Grade

AAS (55)
AAS Standard (11)
ACS (55)
ACS Reagent (24)
ACS/ASTM E 200/AOAC/EPA (7)
ACS/ASTM E 200/AOAC/USP Volumetric (5)
APHA/EPA (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 mL (1)
0.1 mol (1)
0.5 L (1)
0.5 mL (15)
0.5 mol (1)
1 Bottle (5)
1 Box (1)

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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 (100)
>8 (1)
<0.5 (3)
<1 (99)

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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 (30)
Capsule (11)
Chemvelope (1)
Clear Liquid (1)
Clear Liquid at 20°C (2)
Colorless Liquid (1)
Crystalline (17)

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Technique

AA (469)
Acidimetry (3)
Calibrating the absorbance of spectrophotometers (1)
Calibration (7)
Calibration and Matrix Spikes (1)
Calibration and Verification (16)
Calibration and Verification of Kinematic and Dynamic Viscosity Test (15)

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Solution Type

Antigen Retrieval Reagent (1)
Aqueous (2)
Buffer (373)
Buffer, Storage (2)
Calibration (8)
Cleaning (1)
Colored pH Buffer (35)

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Search Within Results

286 – 300 of 45,030 results

286

EP Reference Solution BY₄, Brownish-Yellow Reference Solution, Ricca Chemical

Pricing & Availability

287

Acetate Buffer Solution, pH 3.5, for USP Heavy Metals Testing, Ricca Chemical

Pricing & Availability
Specifications

Packaging	Natural Poly Bottle
Physical Form	Liquid
pH	3.5
Chemical Name or Material	Acetate Buffer Solution
Grade	Laboratory
Solution Type	Buffer

288

Buffer Solution pH 2.0 at 25°C, Certified, LabChem™

Pricing & Availability
Specifications

Linear Formula	KCl
Color	Colorless
Traceability to NIST	Traceable to NIST
Physical Form	Liquid
Chemical Name or Material	Buffer Solution pH 2.0 at 25°C
Grade	Certified
Identification	Passes Test
Density	1g/mL
CAS	7647-01-0
Decomposition Information	Hydrogen chloride
Health Hazard 2	GHS H Statement Causes skin and serious eye irritation.
Solubility Information	Soluble in water
pH	2.00 ±0.01
Health Hazard 1	Warning
Recommended Storage	Room Temperature
Formula Weight	74.55
Specific Gravity	1g/mL
CAS Max %	0.04

289

Buffer Solution pH 5.0 at 25°C, Certified, LabChem™

Pricing & Availability
Specifications

Linear Formula	KHC₈H₄O₄
Color	Colorless
Traceability to NIST	Traceable to NIST
Physical Form	Liquid
Chemical Name or Material	Buffer Solution pH 5.0 at 25°C
Grade	Certified
Identification	Passes Test
Density	1g/mL
CAS	67-56-1
Health Hazard 3	GHS P Statement If in contact with skin or eyes, rinse thoroughly with water for 15-20 minutes. If swallowed, get medical attention.
Decomposition Information	Formaldehyde; Carbon monoxide; Carbon dioxide
Health Hazard 2	GHS H Statement Solution is not hazardous.
Solubility Information	Soluble in water
pH	5.00 ±0.01
Recommended Storage	Room Temperature
Formula Weight	204.23
Specific Gravity	1g/mL
CAS Max %	0.005

290

Water Hardness Buffer, Certified, LabChem™

Pricing & Availability
Specifications

Linear Formula	C₂H₇NO
Color	Yellow
Physical Form	Liquid
Chemical Name or Material	Water Hardness Buffer
Grade	Certified
Identification	Passes Test
CAS	14402-88-1
Health Hazard 3	GHS P Statement Avoid breathing mist, vapors, spray. Use only outdoors or in a well-ventilated area. Wear protective gloves, eye protection. Wash exposed skin thoroughly after handling. Avoid release to the environment. If on skin: Wash with plenty of soap and water. Take off contaminated clothing and wash before reuse. If skin irritation occurs: Get medical advice/attention. If inhaled: Remove person to fresh air and keep comfortable for breathing. Call a poison center/doctor if you feel unwell. If in eyes: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. If eye irritation persists: Get medical advice/attention. Dispose of contents/container to comply with local, state and federal regulations.
Decomposition Information	Nitrogen oxides; Carbon monoxide; Carbon dioxide
Health Hazard 2	GHS H Statement Causes skin irritation. Causes serious eye irritation. Harmful if inhaled. Harmful to aquatic life.
Solubility Information	Soluble in water
Packaging	Poly Bottle
Health Hazard 1	Warning
Recommended Storage	Room Temperature
Formula Weight	61.08
Odor	Odorless
CAS Max %	0.5

291

Hydrogen Peroxide (30% in Water), Fisher BioReagents

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

292

EP Reference Solution Y₇, Yellow Reference Solution, Ricca Chemical

Pricing & Availability

293

Ammonia Standard, 1000 ppm NH₃ (822 ppm N), Ricca Chemical

CAS: 12125-02-9 Molecular Formula: ClH4N Molecular Weight (g/mol): 53.49 MDL Number: MFCD00011420 InChI Key: NLXLAEXVIDQMFP-UHFFFAOYSA-N PubChem CID: 25517 ChEBI: CHEBI:31206 IUPAC Name: amine hydrochloride SMILES: N.Cl

Pricing & Availability
Specifications

PubChem CID	25517
CAS	12125-02-9
Molecular Weight (g/mol)	53.49
ChEBI	CHEBI:31206
MDL Number	MFCD00011420
SMILES	N.Cl
IUPAC Name	amine hydrochloride
InChI Key	NLXLAEXVIDQMFP-UHFFFAOYSA-N
Molecular Formula	ClH4N

294

Calcium Chloride Standard, 1000 ppm CaCO₃ (400 ppm Ca), 0.0100 M Ca²⁺, 0.0200 N Ca²⁺, Ricca Chemical

CAS: 471-34-1 Molecular Formula: CCaO3 Molecular Weight (g/mol): 100.09 MDL Number: MFCD00010906 InChI Key: VTYYLEPIZMXCLO-UHFFFAOYSA-L PubChem CID: 10112 ChEBI: CHEBI:3311 IUPAC Name: calcium carbonate SMILES: [Ca++].[O-]C([O-])=O

Pricing & Availability
Specifications

PubChem CID	10112
CAS	471-34-1
Molecular Weight (g/mol)	100.09
ChEBI	CHEBI:3311
MDL Number	MFCD00010906
SMILES	[Ca++].[O-]C([O-])=O
IUPAC Name	calcium carbonate
InChI Key	VTYYLEPIZMXCLO-UHFFFAOYSA-L
Molecular Formula	CCaO3

295

Sodium Hydroxide, 30% (w/v), Ricca Chemical

CAS: 1310-73-2 Molecular Formula: HNaO Molecular Weight (g/mol): 39.997 InChI Key: HEMHJVSKTPXQMS-UHFFFAOYSA-M Synonym: sodium hydroxide,caustic soda,sodium hydrate,white caustic,soda lye,aetznatron,ascarite,sodium hydroxide na oh,sodium hydroxide solution,soda, caustic PubChem CID: 14798 ChEBI: CHEBI:32145 IUPAC Name: sodium;hydroxide SMILES: [OH-].[Na+]

Pricing & Availability
Specifications

PubChem CID	14798
CAS	1310-73-2
Molecular Weight (g/mol)	39.997
ChEBI	CHEBI:32145
SMILES	[OH-].[Na+]
Synonym	sodium hydroxide,caustic soda,sodium hydrate,white caustic,soda lye,aetznatron,ascarite,sodium hydroxide na oh,sodium hydroxide solution,soda, caustic
IUPAC Name	sodium;hydroxide
InChI Key	HEMHJVSKTPXQMS-UHFFFAOYSA-M
Molecular Formula	HNaO

296

EP Color Standard B, Brown Standard Solution, Ricca Chemical

Pricing & Availability

297

Zinc Sulfate, 0.0500 M (M/20), Ricca Chemical

CAS: 7446-20-0 Molecular Formula: H14O11SZn Molecular Weight (g/mol): 287.54 MDL Number: MFCD00149894 InChI Key: RZLVQBNCHSJZPX-UHFFFAOYSA-L Synonym: zinc sulfate heptahydrate,zinc sulfate jan,zinc sulfate 1:1 heptahydrate,unii-n57ji2k7wp,zinc vitriol heptahydrate,zinc sulfate heptahydrate 1:1:7,white vitriol heptahydrate,ccris 5563,zinc sulfate znso4 heptahydrate,znso4.7h2o PubChem CID: 62640 ChEBI: CHEBI:32312 IUPAC Name: zinc(2+) heptahydrate sulfate SMILES: O.O.O.O.O.O.O.[Zn++].[O-]S([O-])(=O)=O

Pricing & Availability
Specifications

PubChem CID	62640
CAS	7446-20-0
Molecular Weight (g/mol)	287.54
ChEBI	CHEBI:32312
MDL Number	MFCD00149894
SMILES	O.O.O.O.O.O.O.[Zn++].[O-]S([O-])(=O)=O
Synonym	zinc sulfate heptahydrate,zinc sulfate jan,zinc sulfate 1:1 heptahydrate,unii-n57ji2k7wp,zinc vitriol heptahydrate,zinc sulfate heptahydrate 1:1:7,white vitriol heptahydrate,ccris 5563,zinc sulfate znso4 heptahydrate,znso4.7h2o
IUPAC Name	zinc(2+) heptahydrate sulfate
InChI Key	RZLVQBNCHSJZPX-UHFFFAOYSA-L
Molecular Formula	H14O11SZn

298

Buffer, Reference Standard, pH 8.00 ± 0.01 at 25°C, Ricca Chemical

Pricing & Availability
Specifications

For Use With (Equipment)	pH Meter and Electrode
Physical Form	Liquid
pH	8
Concentration	1X
For Use With (Application)	Calibration
Solution Type	pH Buffer

299

Iron AA Standard, 1000 ppm Fe in 3% HNO₃, Ricca Chemical

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

300

Nitrate Nitrogen Standard, 10 ppm N (44.27 ppm NO₃^-), Ricca Chemical

CAS: 7757-79-1 Molecular Formula: KNO3 Molecular Weight (g/mol): 101.10 MDL Number: MFCD00011409 InChI Key: FGIUAXJPYTZDNR-UHFFFAOYSA-N PubChem CID: 24434 ChEBI: CHEBI:63043 IUPAC Name: potassium nitrate SMILES: [K+].[O-][N+]([O-])=O

Pricing & Availability
Specifications

PubChem CID	24434
CAS	7757-79-1
Molecular Weight (g/mol)	101.10
ChEBI	CHEBI:63043
MDL Number	MFCD00011409
SMILES	[K+].[O-][N+]([O-])=O
IUPAC Name	potassium nitrate
InChI Key	FGIUAXJPYTZDNR-UHFFFAOYSA-N
Molecular Formula	KNO3

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Buffers and Standards

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Buffer Solution pH 5.0 at 25°C, Certified, LabChem™ GSA/VA ContractAvailable on GSA/VA contract for Federal Government customers.Learn More

Hydrogen Peroxide (30% in Water), Fisher BioReagents GSA/VA ContractAvailable on GSA/VA contract for Federal Government customers.Learn More

Buffer, Reference Standard, pH 8.00 ± 0.01 at 25°C, Ricca Chemical SureTRACESupports traceability with guaranteed access to certificates and proactive change notifications.Learn More

Buffer Solution pH 5.0 at 25°C, Certified, LabChem™

Hydrogen Peroxide (30% in Water), Fisher BioReagents

Buffer, Reference Standard, pH 8.00 ± 0.01 at 25°C, Ricca Chemical