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)

Spectroscopy Standards (5,640)

General Chemistry Solutions (5,062)

Matrix Blanks and Standardization Solutions (4,283)

Life Science Buffers (4,168)

Electrochemistry Buffers (2,348)

Environmental Testing Standards (1,850)

Electrochemistry Standards (1,241)

Karl Fischer Buffers and Reagents (473)

Isotope Standards (387)

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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Available on GSA/VA Contract (381)
SureTRACE (78)
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Small and Specialty Supplier (18,497)

Grade

AAS (55)
AAS Standard (11)
ACS (55)
ACS Reagent (25)
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 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

286 – 300 of 44,631 results

286

Sulfate Standard, 1000 ppm SO₄²^-, Ricca Chemical

CAS: 7757-82-6 Molecular Formula: Na2O4S Molecular Weight (g/mol): 142.04 MDL Number: MFCD00003504 InChI Key: PMZURENOXWZQFD-UHFFFAOYSA-L PubChem CID: 24436 ChEBI: CHEBI:32149 IUPAC Name: disodium sulfate SMILES: [Na+].[Na+].[O-]S([O-])(=O)=O

Pricing & Availability
Specifications

PubChem CID	24436
CAS	7757-82-6
Molecular Weight (g/mol)	142.04
ChEBI	CHEBI:32149
MDL Number	MFCD00003504
SMILES	[Na+].[Na+].[O-]S([O-])(=O)=O
IUPAC Name	disodium sulfate
InChI Key	PMZURENOXWZQFD-UHFFFAOYSA-L
Molecular Formula	Na2O4S

287

Sodium Thiosulfate, 0.0250 N (N/40), Ricca Chemical

CAS: 10102-17-7 Molecular Formula: H10Na2O8S2 InChI Key: PODWXQQNRWNDGD-UHFFFAOYSA-L Synonym: sodium thiosulfate pentahydrate,ametox,sodium thiosulfate, pentahydrate,antichlor,tinver,disodium thiosulfate pentahydrate,unii-hx1032v43m,ccris 3952,thiosulfuric acid, disodium salt, pentahydrate,sodium hyposulfite pentahydrate PubChem CID: 61475 ChEBI: CHEBI:32150

Pricing & Availability
Specifications

PubChem CID	61475
CAS	10102-17-7
ChEBI	CHEBI:32150
Synonym	sodium thiosulfate pentahydrate,ametox,sodium thiosulfate, pentahydrate,antichlor,tinver,disodium thiosulfate pentahydrate,unii-hx1032v43m,ccris 3952,thiosulfuric acid, disodium salt, pentahydrate,sodium hyposulfite pentahydrate
InChI Key	PODWXQQNRWNDGD-UHFFFAOYSA-L
Molecular Formula	H10Na2O8S2

288

Phosphate Phosphorus Standard, 100 ppm P (306.6 ppm PO₄³^-), 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

289

Bromide Standard, 1000 ppm Br^-, Ricca Chemical

CAS: 7647-15-6 Molecular Formula: BrNa Molecular Weight (g/mol): 102.89 MDL Number: MFCD00003475 InChI Key: JHJLBTNAGRQEKS-UHFFFAOYSA-M PubChem CID: 253881 ChEBI: CHEBI:63004 IUPAC Name: sodium bromide SMILES: [Na+].[Br-]

Pricing & Availability
Specifications

PubChem CID	253881
CAS	7647-15-6
Molecular Weight (g/mol)	102.89
ChEBI	CHEBI:63004
MDL Number	MFCD00003475
SMILES	[Na+].[Br-]
IUPAC Name	sodium bromide
InChI Key	JHJLBTNAGRQEKS-UHFFFAOYSA-M
Molecular Formula	BrNa

290

Sodium Hydroxide, 5.00 N, 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

291

Buffer, Reference Standard, pH 5.00 ± 0.01 at 25°C, Ricca Chemical

Pricing & Availability
Specifications

CAS	877-24-7
For Use With (Equipment)	pH Meter and Electrode
Color	Colorless
Physical Form	Liquid
pH	5
Concentration	1X
For Use With (Application)	Calibration
Solution Type	pH Buffer

292

Cyanide Standard, 1000 ppm CN^-, Ricca Chemical

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

293

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

294

Chloride Standard, 1000 ppm Cl^- (0.0282 N), Ricca Chemical

CAS: 7647-14-5 Molecular Formula: ClNa Molecular Weight (g/mol): 58.44 MDL Number: MFCD00003477 InChI Key: FAPWRFPIFSIZLT-UHFFFAOYSA-M PubChem CID: 5234 ChEBI: CHEBI:26710 IUPAC Name: sodium chloride SMILES: [Na+].[Cl-]

Pricing & Availability
Specifications

PubChem CID	5234
CAS	7647-14-5
Molecular Weight (g/mol)	58.44
ChEBI	CHEBI:26710
MDL Number	MFCD00003477
SMILES	[Na+].[Cl-]
IUPAC Name	sodium chloride
InChI Key	FAPWRFPIFSIZLT-UHFFFAOYSA-M
Molecular Formula	ClNa

295

Silver Nitrate, 0.0100 N (N/100), Ricca Chemical

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
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

296

Hexavalent Chromium Standard, 100 ppm Cr⁶⁺, Ricca Chemical

CAS: 7732-18-5

Pricing & Availability
Specifications

CAS	7732-18-5

297

Zinc Sulfate, 0.100 M (M/10), 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

Zinc AA Standard, 1000 ppm Zn in 3% HNO₃, Ricca Chemical

CAS: 7440-66-6 Molecular Formula: Zn Molecular Weight (g/mol): 65.38 MDL Number: MFCD00011291 InChI Key: HCHKCACWOHOZIP-UHFFFAOYSA-N PubChem CID: 23994 ChEBI: CHEBI:30185 IUPAC Name: zinc SMILES: [Zn]

Pricing & Availability
Specifications

PubChem CID	23994
CAS	7440-66-6
Molecular Weight (g/mol)	65.38
ChEBI	CHEBI:30185
MDL Number	MFCD00011291
SMILES	[Zn]
IUPAC Name	zinc
InChI Key	HCHKCACWOHOZIP-UHFFFAOYSA-N
Molecular Formula	Zn

299

Color Standard, APHA/Hazen (Platinum-Cobalt), Color = 50, Ricca Chemical

Pricing & Availability
Specifications

Boiling Point	100°C
Name Note	Color = 50
CAS	7732-18-5
Color	Brown/Yellow to Yellow
Physical Form	Liquid
CAS Min %	0.01
Packaging	Amber Glass Bottle
Chemical Name or Material	Color Standard
Methods	APHA / Hazen (Platinum-Cobalt)
CAS Max %	0.01

300

Ferrous Ammonium Sulfate, 0.00282 N (0.00282 M), 1 mL = 0.1 mg Cl₂, Ricca Chemical

CAS: 7783-85-9 Molecular Formula: FeH20N2O14S2 Molecular Weight (g/mol): 392.13 MDL Number: MFCD00150530 InChI Key: MQLVWQSVRZVNIP-UHFFFAOYSA-L IUPAC Name: λ2-iron(2+) diammonium hexahydrate disulfate SMILES: [NH4+].[NH4+].O.O.O.O.O.O.[Fe++].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O

Pricing & Availability
Specifications

CAS	7783-85-9
Molecular Weight (g/mol)	392.13
MDL Number	MFCD00150530
SMILES	[NH4+].[NH4+].O.O.O.O.O.O.[Fe++].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O
IUPAC Name	λ2-iron(2+) diammonium hexahydrate disulfate
InChI Key	MQLVWQSVRZVNIP-UHFFFAOYSA-L
Molecular Formula	FeH20N2O14S2

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Buffers and Standards

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Buffer, Reference Standard, pH 5.00 ± 0.01 at 25°C, Ricca Chemical SureTRACESupports traceability with guaranteed access to certificates and proactive change notifications.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

Buffer, Reference Standard, pH 5.00 ± 0.01 at 25°C, Ricca Chemical

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