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 (24,149)

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General Chemistry Solutions (5,062)

Matrix Blanks and Standardization Solutions (4,283)

Life Science Buffers (4,168)

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Karl Fischer Buffers and Reagents (473)

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Viscosity Standards (260)

Quality Control and Proficiency Samples (183)

Kjeldahl Buffers and Reagents (90)

Gel Filtration Standards (58)

Matrix Modifiers (29)

Osmolality Standards (12)

Smoke Point Reference (9)

Polarimetric Standards (6)

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Grade

AAS (55)
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ACS (55)
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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 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 (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 (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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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 (16)
Agarose Gel Electrophoresis, Polyacrylamide Gel Electrophoresis (1)

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Search Within Results

256 – 270 of 44,631 results

256

Ferric Chloride, 0.025% (w/v) as Hexahydrate, for BOD, LabChem™

CAS: 10025-77-1 Molecular Formula: Cl3FeH12O6 Molecular Weight (g/mol): 270.29 MDL Number: MFCD00149712 InChI Key: NQXWGWZJXJUMQB-UHFFFAOYSA-K IUPAC Name: iron(3+) hexahydrate trichloride SMILES: O.O.O.O.O.O.[Cl-].[Cl-].[Cl-].[Fe+3]

Pricing & Availability
Specifications

CAS	10025-77-1
Molecular Weight (g/mol)	270.29
MDL Number	MFCD00149712
SMILES	O.O.O.O.O.O.[Cl-].[Cl-].[Cl-].[Fe+3]
IUPAC Name	iron(3+) hexahydrate trichloride
InChI Key	NQXWGWZJXJUMQB-UHFFFAOYSA-K
Molecular Formula	Cl3FeH12O6

257

Nitrate Standard, 1000 ppm NO₃^- (226 ppm N), 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

258

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

Pricing & Availability

259

Conductivity Standard, 1409μmho/cm, Certified, LabChem™

Pricing & Availability
Specifications

Linear Formula	KCl
Solubility	Soluble in water
Color	Colorless
Physical Form	Liquid
Grade	Certified
Identification	Passes Test
Density	1g/mL
Name Note	1409μmho/cm
CAS	7732-18-5
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.
Health Hazard 2	GHS H Statement Solution is not hazardous.
Recommended Storage	Room Temperature
Formula Weight	74.55
CAS Max %	0.07

260

Sulfosalicylic Acid, 3% (w/v), Ricca Chemical

CAS: 97-05-2 Molecular Formula: C7H6O6S Molecular Weight (g/mol): 218.179 InChI Key: YCPXWRQRBFJBPZ-UHFFFAOYSA-N Synonym: 5-sulfosalicylic acid,sulfosalicylic acid,5-sulphosalicylic acid,salicylsulfonic acid,benzoic acid, 2-hydroxy-5-sulfo,salicylic acid, sulfo,benzoic acid, 2-hydroxysulfo,sulphosalicylic acid,salicylic acid, 5-sulfo,2-hydroxybenzoic-5-sulfonic acid PubChem CID: 7322 ChEBI: CHEBI:68555 IUPAC Name: 2-hydroxy-5-sulfobenzoic acid SMILES: C1=CC(=C(C=C1S(=O)(=O)O)C(=O)O)O

Pricing & Availability
Specifications

PubChem CID	7322
CAS	97-05-2
Molecular Weight (g/mol)	218.179
ChEBI	CHEBI:68555
SMILES	C1=CC(=C(C=C1S(=O)(=O)O)C(=O)O)O
Synonym	5-sulfosalicylic acid,sulfosalicylic acid,5-sulphosalicylic acid,salicylsulfonic acid,benzoic acid, 2-hydroxy-5-sulfo,salicylic acid, sulfo,benzoic acid, 2-hydroxysulfo,sulphosalicylic acid,salicylic acid, 5-sulfo,2-hydroxybenzoic-5-sulfonic acid
IUPAC Name	2-hydroxy-5-sulfobenzoic acid
InChI Key	YCPXWRQRBFJBPZ-UHFFFAOYSA-N
Molecular Formula	C7H6O6S

261

Fluoride Standard, 1000 ppm F^-, 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

262

Silver Nitrate, 0.0500 N (N/20), Ricca Chemical

CAS: 7761-88-8 Molecular Formula: AgNO3 Molecular Weight (g/mol): 169.87 MDL Number: MFCD00003414 InChI Key: SQGYOTSLMSWVJD-UHFFFAOYSA-N Synonym: silver nitrate,silvernitrate,lunar caustic,silbernitrat,argenti nitras,nitrate d'argent,nitric acid silver i salt,silver mononitrate,silver i nitrate,argerol PubChem CID: 24470 ChEBI: CHEBI:32130 IUPAC Name: silver(1+) nitrate SMILES: [Ag+].[O-][N+]([O-])=O

Pricing & Availability
Specifications

PubChem CID	24470
CAS	7761-88-8
Molecular Weight (g/mol)	169.87
ChEBI	CHEBI:32130
MDL Number	MFCD00003414
SMILES	[Ag+].[O-][N+]([O-])=O
Synonym	silver nitrate,silvernitrate,lunar caustic,silbernitrat,argenti nitras,nitrate d'argent,nitric acid silver i salt,silver mononitrate,silver i nitrate,argerol
IUPAC Name	silver(1+) nitrate
InChI Key	SQGYOTSLMSWVJD-UHFFFAOYSA-N
Molecular Formula	AgNO3

263

Conductivity Standard, 100 μS/cm at 25°C (47.2 ppm TDS as NaCl), Ricca Chemical

Pricing & Availability
Specifications

Boiling Point	100°C
Solubility	Completely miscible
Color	Colorless
Physical Form	Liquid
CAS Min %	0.0046
Chemical Name or Material	Conductivity/TDS Standard
Type	Conductivity Standard
Name Note	100μS/cm (100μmho/cm) at 25°C
Concentration or Composition (by Analyte or Components)	47.2ppm as NaCl
CAS	7732-18-5
pH	6.7 to 7.3
DOT Information	Not Regulated by DOT
Shelf Life	24 months
Solution Type	Conductivity Standard
Melting Point	0°C
CAS Max %	0.0048

264

Buffer, Reference Standard, pH 9.18 ± 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	9.18
Concentration	1X
Shelf Life	18 months
For Use With (Application)	Calibration
Solution Type	pH Buffer

265

Potassium Chloride, Saturated, Approximately 4 M, Ricca Chemical

CAS: 7447-40-7 Molecular Formula: ClK Molecular Weight (g/mol): 74.55 MDL Number: MFCD00011360 InChI Key: WCUXLLCKKVVCTQ-UHFFFAOYSA-M Synonym: potassium chloride,enseal,muriate of potash,klotrix,sylvite,slow-k,potassium chloride kcl,klor-con,chlorvescent,kalitabs 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+]
Synonym	potassium chloride,enseal,muriate of potash,klotrix,sylvite,slow-k,potassium chloride kcl,klor-con,chlorvescent,kalitabs
IUPAC Name	potassium chloride
InChI Key	WCUXLLCKKVVCTQ-UHFFFAOYSA-M
Molecular Formula	ClK

266

Potassium Chloride, 0.0100 M (M/100), 1412 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

267

Potassium Iodide TS, 16.5% (w/v), Stabilized, Ricca Chemical

CAS: 7681-11-0 Molecular Formula: IK Molecular Weight (g/mol): 166.00 InChI Key: NLKNQRATVPKPDG-UHFFFAOYSA-M Synonym: potassium iodide,potassium iodide ki,pima,kali iodide,thyro-block,knollide,kisol,asmofug e,potassium diiodide,potassium monoiodide PubChem CID: 4875 ChEBI: CHEBI:8346 IUPAC Name: potassium iodide SMILES: [K+].[I-]

Pricing & Availability
Specifications

PubChem CID	4875
CAS	7681-11-0
Molecular Weight (g/mol)	166.00
ChEBI	CHEBI:8346
SMILES	[K+].[I-]
Synonym	potassium iodide,potassium iodide ki,pima,kali iodide,thyro-block,knollide,kisol,asmofug e,potassium diiodide,potassium monoiodide
IUPAC Name	potassium iodide
InChI Key	NLKNQRATVPKPDG-UHFFFAOYSA-M
Molecular Formula	IK

268

Sulfate Standard Stock Solution, 1000 ppm SO₄²^-, Ricca Chemical

CAS: 7778-80-5 Molecular Formula: K2O4S Molecular Weight (g/mol): 174.25 MDL Number: MFCD00011388 InChI Key: OTYBMLCTZGSZBG-UHFFFAOYSA-L PubChem CID: 24507 ChEBI: CHEBI:32036 IUPAC Name: dipotassium sulfate SMILES: [K+].[K+].[O-]S([O-])(=O)=O

Pricing & Availability
Specifications

PubChem CID	24507
CAS	7778-80-5
Molecular Weight (g/mol)	174.25
ChEBI	CHEBI:32036
MDL Number	MFCD00011388
SMILES	[K+].[K+].[O-]S([O-])(=O)=O
IUPAC Name	dipotassium sulfate
InChI Key	OTYBMLCTZGSZBG-UHFFFAOYSA-L
Molecular Formula	K2O4S

269

Chemical Oxygen Demand Standard, 300 ppm COD, Ricca Chemical

Potassium Acid Phthalate in Water. For Chemical Oxygen Demand in Water (Non-Regulated).

Pricing & Availability
Specifications

Boiling Point	100°C
Packaging	Natural Poly Bottle
Chemical Name or Material	COD STANDARD

270

Conductivity Standard, 1000 μS/cm at 25°C (495 ppm TDS as NaCl), Ricca Chemical

Pricing & Availability
Specifications

Boiling Point	100°C
Type	Conductivity Standard
Name Note	1mS/cm (1000μmho/cm) at 25°C
Concentration or Composition (by Analyte or Components)	495ppm as NaCl
CAS	7732-18-5
Color	Colorless
Physical Form	Liquid
CAS Min %	0.05
Chemical Name or Material	Conductivity/TDS Standard
Solution Type	Conductivity Standard
CAS Max %	0.05

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Buffers and Standards

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Ferric Chloride, 0.025% (w/v) as Hexahydrate, for BOD, LabChem™ GSA/VA ContractAvailable on GSA/VA contract for Federal Government customers.Learn More

Conductivity Standard, 100 μS/cm at 25°C (47.2 ppm TDS as NaCl), Ricca Chemical SureTRACESupports traceability with guaranteed access to certificates and proactive change notifications.Learn More

Conductivity Standard, 1000 μS/cm at 25°C (495 ppm TDS as NaCl), Ricca Chemical SureTRACESupports traceability with guaranteed access to certificates and proactive change notifications.Learn More

Ferric Chloride, 0.025% (w/v) as Hexahydrate, for BOD, LabChem™

Conductivity Standard, 100 μS/cm at 25°C (47.2 ppm TDS as NaCl), Ricca Chemical

Conductivity Standard, 1000 μS/cm at 25°C (495 ppm TDS as NaCl), Ricca Chemical