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 (24,310)

Spectroscopy Standards (5,752)

General Chemistry Solutions (5,095)

Matrix Blanks and Standardization Solutions (4,314)

Life Science Buffers (4,213)

Electrochemistry Buffers (2,364)

Environmental Testing Standards (1,894)

Electrochemistry Standards (1,249)

Karl Fischer Buffers and Reagents (467)

Isotope Standards (380)

Viscosity Standards (258)

Quality Control and Proficiency Samples (184)

Kjeldahl Buffers and Reagents (90)

Gel Filtration Standards (59)

Matrix Modifiers (29)

Osmolality Standards (12)

Smoke Point Reference (10)

Polarimetric Standards (6)

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Grade

AAS (55)
AAS Standard (11)
ACS (55)
ACS Reagent (24)
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 mL (1)
0.1 mol (1)
0.5 L (1)
0.5 mL (15)
0.5 mol (1)
1 Bottle (5)
1 Box (1)

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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 (100)
>8 (1)
<0.5 (3)
<1 (99)

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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 (469)
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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Solution Type

Antigen Retrieval Reagent (1)
Aqueous (2)
Buffer (373)
Buffer, Storage (2)
Calibration (8)
Cleaning (1)
Colored pH Buffer (35)

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Search Within Results

376 – 390 of 45,039 results

376

CAS	1336-21-6
pH	Alkaline
Packaging	Natural Poly Bottle
Grade	Laboratory

377

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

378

Calcium Hydroxide TS (Saturated Aqueous Solution), Ricca Chemical

CAS: 1305-62-0 Molecular Formula: CaH2O2 Molecular Weight (g/mol): 74.09 MDL Number: MFCD00010901 InChI Key: AXCZMVOFGPJBDE-UHFFFAOYSA-L Synonym: calcium hydroxide,slaked lime,hydrated lime,calcium dihydroxide,calcium ii hydroxide,calcium oxide, hydrated,kalziumhydroxid,loeschkalk,pickling lime,calciumdihydroxid PubChem CID: 6093208 ChEBI: CHEBI:31341 IUPAC Name: calcium dihydroxide SMILES: [OH-].[OH-].[Ca++]

Pricing & Availability
Specifications

PubChem CID	6093208
CAS	1305-62-0
Molecular Weight (g/mol)	74.09
ChEBI	CHEBI:31341
MDL Number	MFCD00010901
SMILES	[OH-].[OH-].[Ca++]
Synonym	calcium hydroxide,slaked lime,hydrated lime,calcium dihydroxide,calcium ii hydroxide,calcium oxide, hydrated,kalziumhydroxid,loeschkalk,pickling lime,calciumdihydroxid
IUPAC Name	calcium dihydroxide
InChI Key	AXCZMVOFGPJBDE-UHFFFAOYSA-L
Molecular Formula	CaH2O2

379

Sodium Thiosulfate, 0.100 N (N/10), 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

380

Amine-Sulfuric Acid Reagent, for Sulfide Determination (Methylene Blue Method), Ricca Chemical

Sulfide Determination (Methylene Blue Method)

Pricing & Availability
Specifications

CAS	62778-12-5
Color	Tan to Yellow
Physical Form	Liquid
pH	<3
Packaging	Safety-coated Glass Bottle
CAS Min %	0.34
Chemical Name or Material	Amine-Sulfuric Acid Reagent
Grade	Laboratory
CAS Max %	0.36

381

Buffer, Reference Standard, pH 7.00 ± 0.01 at 25°C (Color Coded Green), Ricca Chemical

Pricing & Availability
Specifications

CAS	7732-18-5
For Use With (Equipment)	pH Meter and Electrode
Color	Green
Physical Form	Liquid
pH	7
Concentration	1X
Shelf Life	24 months
For Use With (Application)	Calibration
Solution Type	Colored pH Buffer
CAS Max %	0.5

382

Buffer, Reference Standard, pH 6.86 ± 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	6.86
CAS Min %	0.33
Concentration	1X
For Use With (Application)	Calibration
Solution Type	pH Buffer
CAS Max %	0.34

383

EP Reference Solution Y₇, Yellow Reference Solution, Ricca Chemical

Pricing & Availability

384

Ammonia Standard, 1000 ppm NH₃ (822 ppm N), Ricca Chemical

CAS: 12125-02-9 Molecular Formula: ClH4N Molecular Weight (g/mol): 53.49 MDL Number: MFCD00011420 InChI Key: NLXLAEXVIDQMFP-UHFFFAOYSA-N PubChem CID: 25517 ChEBI: CHEBI:31206 IUPAC Name: amine hydrochloride SMILES: N.Cl

Pricing & Availability
Specifications

PubChem CID	25517
CAS	12125-02-9
Molecular Weight (g/mol)	53.49
ChEBI	CHEBI:31206
MDL Number	MFCD00011420
SMILES	N.Cl
IUPAC Name	amine hydrochloride
InChI Key	NLXLAEXVIDQMFP-UHFFFAOYSA-N
Molecular Formula	ClH4N

385

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

386

Potassium Chloride Conductivity Standard, 10 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

387

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

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

388

Conductivity Standard, 2000 μS/cm at 25°C (1000 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

389

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

390

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

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