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 (23,986)

Spectroscopy Standards (5,622)

General Chemistry Solutions (5,038)

Matrix Blanks and Standardization Solutions (4,259)

Life Science Buffers (4,141)

Electrochemistry Buffers (2,348)

Environmental Testing Standards (1,845)

Electrochemistry Standards (1,237)

Karl Fischer Buffers and Reagents (470)

Isotope Standards (377)

Viscosity Standards (253)

Quality Control and Proficiency Samples (180)

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 (56)
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 (98)

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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 (35)
Capsule (11)
Chemvelope (1)
Clear Liquid (1)
Clear Liquid at 20°C (2)
Colorless Liquid (1)
Crystalline (22)

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Technique

AA (467)
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 (3)
Buffer (469)
Buffer, Storage (4)
Calibration (8)
Cleaning, Storage, pH Buffer (15)
Colored pH Buffer (35)

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226 – 240 of 44,339 results

226

Buffer, Reference Standard, pH 7.00 ± 0.01 at 25°C (Color Coded Green), Ricca Chemical

Pricing & Availability
Specifications

CAS	7732-18-5
For Use With (Equipment)	pH Meter and Electrode
Color	Green
Physical Form	Liquid
pH	7
Concentration	1X
Shelf Life	24 months
For Use With (Application)	Calibration
Solution Type	Colored pH Buffer
CAS Max %	0.5

227

Buffer, Reference Standard, pH 6.86 ± 0.01 at 25°C, Ricca Chemical

Pricing & Availability
Specifications

CAS	7732-18-5
For Use With (Equipment)	pH Meter and Electrode
Color	Colorless
Physical Form	Liquid
pH	6.86
CAS Min %	0.33
Concentration	1X
For Use With (Application)	Calibration
Solution Type	pH Buffer
CAS Max %	0.34

228

Buffer, Reference Standard, pH 6.00 ± 0.01 at 25°C, Ricca Chemical

Pricing & Availability
Specifications

CAS	7732-18-5
For Use With (Equipment)	pH Meter and Electrode
Color	Colorless
Physical Form	Liquid
pH	6
CAS Min %	0.1
Concentration	1X
For Use With (Application)	Calibration
Solution Type	pH Buffer

229

Buffer, Reference Standard, pH 4.00 ± 0.01 at 25°C, Ricca Chemical

Pricing & Availability
Specifications

Name Note	pH 4.00 ± 0.01 at 25 deg C
CAS	7732-18-5
For Use With (Equipment)	pH Meter and Electrode
Physical Form	Liquid
pH	4
CAS Min %	0.99
Chemical Name or Material	Buffer, Reference Standard
Concentration	1X
For Use With (Application)	Calibration
Solution Type	pH Buffer
CAS Max %	1.03

230

Phenol Standard, 1000 ppm C₆H₅OH (0.100% (w/w)), Ricca Chemical

CAS: 108-95-2 Molecular Formula: C6H6O Molecular Weight (g/mol): 94.11 MDL Number: MFCD00002143 InChI Key: ISWSIDIOOBJBQZ-UHFFFAOYSA-N PubChem CID: 996 ChEBI: CHEBI:15882 IUPAC Name: phenol SMILES: OC1=CC=CC=C1

Pricing & Availability
Specifications

PubChem CID	996
CAS	108-95-2
Molecular Weight (g/mol)	94.11
ChEBI	CHEBI:15882
MDL Number	MFCD00002143
SMILES	OC1=CC=CC=C1
IUPAC Name	phenol
InChI Key	ISWSIDIOOBJBQZ-UHFFFAOYSA-N
Molecular Formula	C6H6O

231

Turbidity Standard, 1000 NTU, Formazin, Ricca Chemical

CAS: 100-97-0 Molecular Formula: C6H12N4 Molecular Weight (g/mol): 140.19 InChI Key: VKYKSIONXSXAKP-UHFFFAOYSA-N PubChem CID: 4101 ChEBI: CHEBI:6824 SMILES: C1N2CN3CN1CN(C2)C3

Pricing & Availability
Specifications

PubChem CID	4101
CAS	100-97-0
Molecular Weight (g/mol)	140.19
ChEBI	CHEBI:6824
SMILES	C1N2CN3CN1CN(C2)C3
InChI Key	VKYKSIONXSXAKP-UHFFFAOYSA-N
Molecular Formula	C6H12N4

232

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

233

Phosphorus Standard, 1000 ppm P, Ricca Chemical

CAS: 7778-77-0 Molecular Formula: H2KO4P Molecular Weight (g/mol): 136.08 MDL Number: MFCD00011401 MFCD00147253 InChI Key: GNSKLFRGEWLPPA-UHFFFAOYSA-M PubChem CID: 516951 ChEBI: CHEBI:63036 IUPAC Name: potassium dihydrogen phosphate SMILES: [K+].OP(O)([O-])=O

Pricing & Availability
Specifications

PubChem CID	516951
CAS	7778-77-0
Molecular Weight (g/mol)	136.08
ChEBI	CHEBI:63036
MDL Number	MFCD00011401 MFCD00147253
SMILES	[K+].OP(O)([O-])=O
IUPAC Name	potassium dihydrogen phosphate
InChI Key	GNSKLFRGEWLPPA-UHFFFAOYSA-M
Molecular Formula	H2KO4P

234

Phosphate Phosphorus Standard, 50 ppm P (153 ppm PO₄³^-), Ricca Chemical

Pricing & Availability

235

Potassium Chloride Conductivity Standard, 1413 μS/cm at 25°C, Ricca Chemical

CAS: 7447-40-7 Molecular Formula: ClK Molecular Weight (g/mol): 74.55 MDL Number: MFCD00011360 InChI Key: WCUXLLCKKVVCTQ-UHFFFAOYSA-M PubChem CID: 4873 ChEBI: CHEBI:32588 IUPAC Name: potassium chloride SMILES: [Cl-].[K+]

Pricing & Availability
Specifications

PubChem CID	4873
CAS	7447-40-7
Molecular Weight (g/mol)	74.55
ChEBI	CHEBI:32588
MDL Number	MFCD00011360
SMILES	[Cl-].[K+]
IUPAC Name	potassium chloride
InChI Key	WCUXLLCKKVVCTQ-UHFFFAOYSA-M
Molecular Formula	ClK

236

Conductivity Standard, 10,000 μS/cm (10 mS/cm) at 25°C, Ricca Chemical

5400 ppm TDS as NaCl

Pricing & Availability
Specifications

Boiling Point	100°C
Type	Conductivity Standard
Name Note	10mS/cm ((10, 000μmho/cm) at 25°C, 5400ppm as NaCl
Concentration or Composition (by Analyte or Components)	5400ppm as NaCl
CAS	7732-18-5
Color	Colorless
Physical Form	Liquid
CAS Min %	0.53
Chemical Name or Material	Conductivity/TDS Standard
Solution Type	Conductivity Standard
CAS Max %	0.55

237

Conductivity Standard, 10 μS/cm at 25°C (4.7 ppm TDS as NaCl), Ricca Chemical

Pricing & Availability
Specifications

Boiling Point	100°C
Solubility	Completely miscible
Color	Colorless
Physical Form	Liquid
CAS Min %	5.0E-4
Chemical Name or Material	Conductivity Standard
Type	Conductivity Standard
Name Note	10μS/cm (10μmho/cm) at 25°C
Concentration or Composition (by Analyte or Components)	4.7 ppm as NaCl
CAS	7732-18-5
pH	6.7 to 7.3
DOT Information	Not Regulated by DOT
Shelf Life	12 months
Solution Type	Conductivity Standard
Melting Point	0°C
CAS Max %	5.0E-4

238

Color Standard, APHA/Hazen (Platinum-Cobalt), Color = 100, Ricca Chemical

Pricing & Availability
Specifications

Boiling Point	100°C
Name Note	Color = 100
CAS	7732-18-5
Color	Brown/Yellow to Yellow
Physical Form	Liquid
Packaging	Amber Glass Bottle
Chemical Name or Material	Color Standard
Methods	APHA / Hazen (Platinum-Cobalt)

239

Copper AA Standard, 1000 ppm Cu in 3% HNO₃, Ricca Chemical

CAS: 7440-50-8 Molecular Formula: Cu Molecular Weight (g/mol): 63.55 MDL Number: MFCD00010965 InChI Key: RYGMFSIKBFXOCR-UHFFFAOYSA-N PubChem CID: 23978 ChEBI: CHEBI:30052 IUPAC Name: copper SMILES: [Cu]

Pricing & Availability
Specifications

PubChem CID	23978
CAS	7440-50-8
Molecular Weight (g/mol)	63.55
ChEBI	CHEBI:30052
MDL Number	MFCD00010965
SMILES	[Cu]
IUPAC Name	copper
InChI Key	RYGMFSIKBFXOCR-UHFFFAOYSA-N
Molecular Formula	Cu

240

EDTA Titrant, 0.0500 M (M/20), Ricca Chemical

CAS: 6381-92-6 Molecular Formula: C10H18N2Na2O10 Molecular Weight (g/mol): 372.24 MDL Number: MFCD00150037,MFCD00003541 InChI Key: OVBJJZOQPCKUOR-UHFFFAOYSA-L Synonym: edta disodium salt,cal-ex decalcifier,buffer solution, ph 10.00,sodium di ethylenediamine tetraacetate dihydrate,ethylenediamine tetraacetic acid, disodium salt dihydrate,ethylenediamine tetraacetic acid, disodium salt, standard solution,sodium di ethylenediamine tetraacetate standard solution,ethylenedinitrilo tetraacetic acid disodium, dihydrate, reagent, acs PubChem CID: 44120005 IUPAC Name: disodium 2-({2-[(carboxylatomethyl)(carboxymethyl)amino]ethyl}(carboxymethyl)amino)acetate dihydrate SMILES: O.O.[Na+].[Na+].OC(=O)CN(CCN(CC(O)=O)CC([O-])=O)CC([O-])=O

Pricing & Availability
Specifications

PubChem CID	44120005
CAS	6381-92-6
Molecular Weight (g/mol)	372.24
MDL Number	MFCD00150037,MFCD00003541
SMILES	O.O.[Na+].[Na+].OC(=O)CN(CCN(CC(O)=O)CC([O-])=O)CC([O-])=O
Synonym	edta disodium salt,cal-ex decalcifier,buffer solution, ph 10.00,sodium di ethylenediamine tetraacetate dihydrate,ethylenediamine tetraacetic acid, disodium salt dihydrate,ethylenediamine tetraacetic acid, disodium salt, standard solution,sodium di ethylenediamine tetraacetate standard solution,ethylenedinitrilo tetraacetic acid disodium, dihydrate, reagent, acs
IUPAC Name	disodium 2-({2-[(carboxylatomethyl)(carboxymethyl)amino]ethyl}(carboxymethyl)amino)acetate dihydrate
InChI Key	OVBJJZOQPCKUOR-UHFFFAOYSA-L
Molecular Formula	C10H18N2Na2O10

Buffers and Standards

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Buffer, Reference Standard, pH 6.00 ± 0.01 at 25°C, Ricca Chemical SureTRACESupports traceability with guaranteed access to certificates and proactive change notifications.Learn More

Buffer, Reference Standard, pH 4.00 ± 0.01 at 25°C, Ricca Chemical SureTRACESupports traceability with guaranteed access to certificates and proactive change notifications.Learn More

Conductivity Standard, 10,000 μS/cm (10 mS/cm) at 25°C, Ricca Chemical SureTRACESupports traceability with guaranteed access to certificates and proactive change notifications.Learn More

Buffer, Reference Standard, pH 6.00 ± 0.01 at 25°C, Ricca Chemical

Buffer, Reference Standard, pH 4.00 ± 0.01 at 25°C, Ricca Chemical

Conductivity Standard, 10,000 μS/cm (10 mS/cm) at 25°C, Ricca Chemical