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)

Narrow Results

special offers

Clearance (2)
Equipment Days (24)
New Lab Start-Up (815)
Offers (26)

special interests

Available on GSA/VA Contract (381)
SureTRACE (78)
Fast Shipping (441)
Greener Choice (95)
Production Products (191)
Science Education (209)
Small and Specialty Supplier (7,030)

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)

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. (5)

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 (98)

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

Show all

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)

Show all

Solution Type

Antigen Retrieval Reagent (1)
Aqueous (3)
Buffer (469)
Buffer, Storage (4)
Calibration (8)
Cleaning, Storage, pH Buffer (15)
Colored pH Buffer (35)

Show all

Search Within Results

196 – 210 of 44,339 results

196

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

197

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

198

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

199

Buffer, Reference Standard, pH 10.00 ± 0.01 at 25°C, Ricca Chemical

Pricing & Availability
Specifications

CAS	7732-18-5
For Use With (Equipment)	pH Meter and Electrode
Physical Form	Liquid
pH	10
CAS Min %	0.03
Chemical Name or Material	Buffer, Reference Standard
Concentration	1X
For Use With (Application)	Calibration
Solution Type	pH Buffer
CAS Max %	0.03

200

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

201

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

202

Buffer, Reference Standard, pH 1.68 ± 0.01 at 25°C, Ricca Chemical

Pricing & Availability
Specifications

Boiling Point	100°C
For Use With (Equipment)	pH Meter and Electrode
Color	Colorless
Physical Form	Liquid
pH	1.68
Concentration	1X
Shelf Life	24 months
For Use With (Application)	Calibration
Solution Type	pH Buffer
Melting Point	0°C

203

CAS	7789-33-5
pH	<1
Packaging	Amber Glass Bottle
Grade	Laboratory

204

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

205

EDTA Titrant, 0.100 M (M/10), 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

206

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

207

Conductivity Standard, 50,000 μS/cm (50 mS/cm) at 25°C (30,300 ppm TDS as NaCl), 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

208

Conductivity Standard, 5000 μS/cm at 25°C (2620 ppm TDS as NaCl), Ricca Chemical

Pricing & Availability
Specifications

Boiling Point	100°C
Type	Conductivity Standard
Concentration or Composition Notes	2620ppm as NaCl
Name Note	5 mS/cm (5000 μmho/cm) at 25°C
CAS	7732-18-5
Color	Colorless
Physical Form	Liquid
CAS Min %	0.26
Chemical Name or Material	Conductivity/TDS Standard
Solution Type	Conductivity Standard
CAS Max %	0.27

209

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

210

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

Buffers and Standards

Filtered Search Results

Narrow Results

Buffer, Reference Standard, pH 10.00 ± 0.01 at 25°C, Ricca Chemical SureTRACESupports traceability with guaranteed access to certificates and proactive change notifications.Learn More

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

Buffer, Reference Standard, pH 1.68 ± 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

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

Buffer, Reference Standard, pH 10.00 ± 0.01 at 25°C, Ricca Chemical

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

Buffer, Reference Standard, pH 1.68 ± 0.01 at 25°C, Ricca Chemical

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