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 (24,051)

Spectroscopy Standards (5,659)

General Chemistry Solutions (5,035)

Matrix Blanks and Standardization Solutions (4,282)

Life Science Buffers (4,126)

Electrochemistry Buffers (2,328)

Environmental Testing Standards (1,865)

Electrochemistry Standards (1,229)

Karl Fischer Buffers and Reagents (467)

Isotope Standards (376)

Viscosity Standards (251)

Quality Control and Proficiency Samples (206)

Kjeldahl Buffers and Reagents (90)

Gel Filtration Standards (57)

Matrix Modifiers (29)

Osmolality Standards (12)

Smoke Point Reference (10)

Polarimetric Standards (6)

Narrow Results

special offers

Clearance (2)
New Lab Start-Up (811)
Offers (811)

special interests

Available on GSA/VA Contract (382)
SureTRACE (78)
Fast Shipping (453)
Greener Choice (96)
Production Products (191)
Science Education (205)
Small and Specialty Supplier (7,020)

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)

Show all

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)

Show all

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. (4)

Show all

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)

Show all

pH

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

Show all

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)

Show all

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)

Show all

Physical Form

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

Show all

Solution Type

Antigen Retrieval Reagent (1)
Aqueous (3)
Buffer (587)
Buffer, Storage (4)
Calibration (8)
Cleaning, Storage, pH Buffer (15)
Colored pH Buffer (43)

Show all

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)

Show all

Search Within Results

226 – 240 of 44,446 results

226

ZoBell's Solution, Oxidation-Reduction Potential (ORP) Standard, Ricca Chemical

Pricing & Availability
Specifications

Boiling Point	100°C
Name Note	Oxidation-Reduction Potential (ORP) Standard
CAS	7732-18-5
Physical Form	Liquid
CAS Min %	0.11
Chemical Name or Material	ZoBell's Solution
CAS Max %	0.11

227

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

228

Conductivity Standard, 200,000 μS/cm (200 mS/cm) at 25°C, Ricca Chemical

Pricing & Availability

229

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

230

Conductivity Standard, 20,000 μS/cm (20 mS/cm) at 25°C (11,000 ppm TDS as NaCl), Ricca Chemical

Pricing & Availability
Specifications

Boiling Point	100°C
Molecular Weight (g/mol)	58.44
ChEBI	CHEBI:26710
Color	Colorless
Physical Form	Liquid
Chemical Name or Material	Conductivity/TDS Standard
SMILES	[Na+].[Cl-]
InChI Key	FAPWRFPIFSIZLT-UHFFFAOYSA-M
PubChem CID	5234
Type	Conductivity Standard
Concentration or Composition Notes	11,000ppm as NaCl
CAS	7732-18-5
MDL Number	MFCD00003477
Packaging	Natural Poly Bottle
IUPAC Name	sodium chloride
Molecular Formula	ClNa

231

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

232

EP Color Standard B, Brown Standard Solution, Ricca Chemical

Pricing & Availability

233

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

234

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

235

Sodium Thiosulfate, 0.0500 N (N/20), Ricca Chemical

CAS: 10102-17-7 Molecular Formula: H10Na2O8S2 Molecular Weight (g/mol): 248.17 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 IUPAC Name: disodium pentahydrate sulfanidesulfonate SMILES: O.O.O.O.O.[Na+].[Na+].[O-]S([S-])(=O)=O

Pricing & Availability
Specifications

PubChem CID	61475
CAS	10102-17-7
Molecular Weight (g/mol)	248.17
ChEBI	CHEBI:32150
SMILES	O.O.O.O.O.[Na+].[Na+].[O-]S([S-])(=O)=O
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
IUPAC Name	disodium pentahydrate sulfanidesulfonate
InChI Key	PODWXQQNRWNDGD-UHFFFAOYSA-L
Molecular Formula	H10Na2O8S2

236

EDTA Titrant, 0.0100 M (M/100), 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

237

EP Reference Solution Y₇, Yellow Reference Solution, Ricca Chemical

Pricing & Availability

238

Silver Nitrate, 0.0141 N (0.0141 M), 1 mL = 0.5 mg Cl^-, 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

239

ORP Standard, +200 mV, Ricca Chemical

CAS: 14459-95-1 Molecular Formula: C6H6FeK4N6O3 Molecular Weight (g/mol): 422.39 MDL Number: MFCD00167023 InChI Key: NLYKFUFIUWPPIZ-UHFFFAOYSA-N IUPAC Name: tetrapotassium hexacyanoironbis(ylium) trihydrate SMILES: O.O.O.[K+].[K+].[K+].[K+].N#C[Fe++](C#N)(C#N)(C#N)(C#N)C#N

Pricing & Availability
Specifications

CAS	14459-95-1
Molecular Weight (g/mol)	422.39
MDL Number	MFCD00167023
SMILES	O.O.O.[K+].[K+].[K+].[K+].N#C[Fe++](C#N)(C#N)(C#N)(C#N)C#N
IUPAC Name	tetrapotassium hexacyanoironbis(ylium) trihydrate
InChI Key	NLYKFUFIUWPPIZ-UHFFFAOYSA-N
Molecular Formula	C6H6FeK4N6O3

240

Thioacetamide TS, 4% (w/v), Ricca Chemical

CAS: 62-55-5 Molecular Formula: C2H5NS Molecular Weight (g/mol): 75.13 MDL Number: MFCD00008070 InChI Key: YUKQRDCYNOVPGJ-UHFFFAOYSA-N Synonym: thioacetamide,acetothioamide,thiacetamide,acetamide, thio,thioacetimidic acid,acetimidic acid, thio,usaf cb-21,usaf ek-1719,rcra waste number u218,acetic acid, thiono-, amide PubChem CID: 2723949 ChEBI: CHEBI:32497 IUPAC Name: ethanethioamide SMILES: CC(N)=S

Pricing & Availability
Specifications

PubChem CID	2723949
CAS	62-55-5
Molecular Weight (g/mol)	75.13
ChEBI	CHEBI:32497
MDL Number	MFCD00008070
SMILES	CC(N)=S
Synonym	thioacetamide,acetothioamide,thiacetamide,acetamide, thio,thioacetimidic acid,acetimidic acid, thio,usaf cb-21,usaf ek-1719,rcra waste number u218,acetic acid, thiono-, amide
IUPAC Name	ethanethioamide
InChI Key	YUKQRDCYNOVPGJ-UHFFFAOYSA-N
Molecular Formula	C2H5NS

Buffers and Standards

Filtered Search Results

Narrow Results

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 4.00 ± 0.01 at 25°C, Ricca Chemical

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