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

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Molecular Weight (g/mol)

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10.81 (14)
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Percent Purity

≥14% (BF3) (1)
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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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Search Within Results

256 – 270 of 43,328 results

256

Ricca Chemical Company Conductivity Standard, 200 μS/cm at 25°C (95 ppm TDS as NaCl), Ricca Chemical

Pricing & Availability
Specifications

Boiling Point	100°C
Type	Conductivity Standard
Packaging	Natural Poly Bottle

257

Ricca Chemical Company 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

258

Ricca Chemical Company 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

259

Ricca Chemical Company 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

260

Ricca Chemical Company 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

261

Ricca Chemical Company 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

262

Ricca Chemical Company Potassium Chloride, 3 M, Filling Solution for ROSS pH Combination and Reference Electrodes, 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

263

Conductivity Standard, 50 μS/cm at 25°C (23.6 ppm TDS as NaCl), Ricca Chemical

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

264

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

Pricing & Availability
Specifications

Boiling Point	100°C
Type	Conductivity Standard
Color	Colorless
pH	6.7 to 7.3
Physical Form	Liquid
Chemical Name or Material	Conductivity Standard
Odor	Odorless
Solution Type	Conductivity Standard

265

Ricca Chemical Company Potassium Chromate, 5% (w/v), Chloride Free, Indicator for Argentometric Titrations, Ricca Chemical

CAS: 7789-00-6 Molecular Formula: CrK2O4 Molecular Weight (g/mol): 194.19 MDL Number: MFCD00011368 InChI Key: XMXNVYPJWBTAHN-UHFFFAOYSA-N Synonym: potassium chromate,bipotassium chromate,potassium chromate vi,dipotassium monochromate,dipotassium chromate,tarapacaite,chromate of potash,chromate of potass,neutral potassium chromate,caswell no. 687 PubChem CID: 24597 ChEBI: CHEBI:75249 IUPAC Name: dipotassium dioxochromiumbis(olate) SMILES: [K+].[K+].[O-][Cr]([O-])(=O)=O

Pricing & Availability
Specifications

PubChem CID	24597
CAS	7789-00-6
Molecular Weight (g/mol)	194.19
ChEBI	CHEBI:75249
MDL Number	MFCD00011368
SMILES	[K+].[K+].[O-][Cr]([O-])(=O)=O
Synonym	potassium chromate,bipotassium chromate,potassium chromate vi,dipotassium monochromate,dipotassium chromate,tarapacaite,chromate of potash,chromate of potass,neutral potassium chromate,caswell no. 687
IUPAC Name	dipotassium dioxochromiumbis(olate)
InChI Key	XMXNVYPJWBTAHN-UHFFFAOYSA-N
Molecular Formula	CrK2O4

266

Ricca Chemical Company 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

267

Ricca Chemical Company 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

268

Ricca Chemical Company Potassium Chloride Conductivity Standard, 50 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

269

Ricca Chemical Company Fehling's Alkaline Solution (Fehling Solution B), Ricca Chemical

For Determination of Reducing Sugars

Pricing & Availability
Specifications

Name Note	Fehling Solution B
CAS	7732-18-5
Color	Colorless
Physical Form	Liquid
pH	>12
Chemical Name or Material	Fehling's Alkaline Solution
Grade	Laboratory

270

Ricca Chemical Company EDTA Titrant, 0.0575 M, 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

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Buffers and Standards

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Ricca Chemical Company Conductivity Standard, 1413 μS/cm at 25°C, Ricca Chemical SureTRACESupports traceability with guaranteed access to certificates and proactive change notifications.Learn More

Ricca Chemical Company Potassium Chloride Conductivity Standard, 50 μS/cm at 25°C, Ricca Chemical GSA/VA ContractAvailable on GSA/VA contract for Federal Government customers.Learn More

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

Ricca Chemical Company Potassium Chloride Conductivity Standard, 50 μS/cm at 25°C, Ricca Chemical