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 (23,990)

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Life Science Buffers (4,142)

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Matrix Modifiers (29)

Osmolality Standards (12)

Smoke Point Reference (10)

Polarimetric Standards (6)

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Grade

AAS (66)
ACS (56)
ACS Reagent (25)
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APHA/EPA (5)
APHA/Hazen (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 (35)
Capsule (11)
Chemvelope (1)
Clear Liquid (1)
Clear Liquid at 20°C (2)
Colorless Liquid (1)
Crystalline (22)

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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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Solution Type

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

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Search Within Results

421 – 435 of 44,325 results

421

Silver Nitrate, 0.00100 N (N/1000), 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

422

Promotions Available

PIPES, 98%

CAS: 5625-37-6 Molecular Formula: C8H18N2O6S2 Molecular Weight (g/mol): 302.36 MDL Number: MFCD00006159 InChI Key: IHPYMWDTONKSCO-UHFFFAOYSA-N Synonym: pipes,1,4-piperazinediethanesulfonic acid,piperazine-n,n'-bis 2-ethanesulfonic acid,2,2'-piperazine-1,4-diyl diethanesulfonic acid,1,4-piperazinebis ethanesulfonic acid,unii-g502h79v6l,2-4-2-sulfoethyl piperazin-1-yl ethanesulfonic acid,piperazine-1,4-bis 2-ethanesulfonic acid,1,4-piperazine-diethanesulfonic acid,2,2'-piperazine-1,4-diyl bis ethanesulphonic acid PubChem CID: 79723 ChEBI: CHEBI:44933 IUPAC Name: 2-[4-(2-sulfoethyl)piperazin-1-yl]ethanesulfonic acid SMILES: C1CN(CCN1CCS(=O)(=O)O)CCS(=O)(=O)O

Pricing & Availability
Specifications

PubChem CID	79723
CAS	5625-37-6
Molecular Weight (g/mol)	302.36
ChEBI	CHEBI:44933
MDL Number	MFCD00006159
SMILES	C1CN(CCN1CCS(=O)(=O)O)CCS(=O)(=O)O
Synonym	pipes,1,4-piperazinediethanesulfonic acid,piperazine-n,n'-bis 2-ethanesulfonic acid,2,2'-piperazine-1,4-diyl diethanesulfonic acid,1,4-piperazinebis ethanesulfonic acid,unii-g502h79v6l,2-4-2-sulfoethyl piperazin-1-yl ethanesulfonic acid,piperazine-1,4-bis 2-ethanesulfonic acid,1,4-piperazine-diethanesulfonic acid,2,2'-piperazine-1,4-diyl bis ethanesulphonic acid
IUPAC Name	2-[4-(2-sulfoethyl)piperazin-1-yl]ethanesulfonic acid
InChI Key	IHPYMWDTONKSCO-UHFFFAOYSA-N
Molecular Formula	C8H18N2O6S2

423

Hyamine Solution, 0.004 M (0.004 N), Ricca Chemical

CAS: 121-54-0 Molecular Formula: C27H42ClNO2 Molecular Weight (g/mol): 448.088 InChI Key: UREZNYTWGJKWBI-UHFFFAOYSA-M Synonym: benzethonium chloride,quatrachlor,hyamine,phemeride,phemerol chloride,benzethoniumchloride,phemithyn,disilyn,kylacol,solamin PubChem CID: 8478 ChEBI: CHEBI:31264 IUPAC Name: benzyl-dimethyl-[2-[2-[4-(2,4,4-trimethylpentan-2-yl)phenoxy]ethoxy]ethyl]azanium;chloride SMILES: CC(C)(C)CC(C)(C)C1=CC=C(C=C1)OCCOCC[N+](C)(C)CC2=CC=CC=C2.[Cl-]

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Specifications

PubChem CID	8478
CAS	121-54-0
Molecular Weight (g/mol)	448.088
ChEBI	CHEBI:31264
SMILES	CC(C)(C)CC(C)(C)C1=CC=C(C=C1)OCCOCC[N+](C)(C)CC2=CC=CC=C2.[Cl-]
Synonym	benzethonium chloride,quatrachlor,hyamine,phemeride,phemerol chloride,benzethoniumchloride,phemithyn,disilyn,kylacol,solamin
IUPAC Name	benzyl-dimethyl-[2-[2-[4-(2,4,4-trimethylpentan-2-yl)phenoxy]ethoxy]ethyl]azanium;chloride
InChI Key	UREZNYTWGJKWBI-UHFFFAOYSA-M
Molecular Formula	C27H42ClNO2

424

Acid Digestion Reagent, For Organic Nitrogen, LabChem™

Pricing & Availability
Specifications

Linear Formula	CuSO₄·5H₂O
Color	Blue
Physical Form	Liquid
UN Number	UN2796
Chemical Name or Material	Acid Digestion Reagent
Identification	Passes Test
Name Note	For Organic Nitrogen
CAS	7758-99-8
Health Hazard 3	GHS P Statement Do not breathe dust, mist. Wear eye protection, face protection, protective clothing, protective gloves. Avoid release to the environment. Wash exposed skin thoroughly after handling. If swallowed: Rinse mouth. Do not induce vomiting. Immediately call a poison center/doctor. If on skin (or hair): Remove/Take off immediately all contaminated clothing. Rinse skin with water/shower. Immediately call a poison center/doctor. Wash contaminated clothing before reuse. If inhaled: Remove person to fresh air and keep comfortable for breathing. Immediately call a poison center/doctor. If in eyes: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. Immediately call a poison center/doctor. Store locked up. Dispose of contents/container to comply with local, state and federal regulations.
Decomposition Information	Sulfur compounds; Copper; Thermal decomposition generates: Corrosive vapors
Health Hazard 2	GHS H Statement Causes severe skin burns and eye damage. Harmful to aquatic life with long lasting effects.
Packaging	Poly Bottle
Solubility Information	Soluble in water
Health Hazard 1	Danger
Recommended Storage	Room Temperature
Formula Weight	249.68
CAS Max %	1.14

425

Sodium bicarbonate, 1M buffer soln., pH 8.5

CAS: 144-55-8 Molecular Formula: CHNaO3 Molecular Weight (g/mol): 84.01 MDL Number: MFCD00003528 InChI Key: UIIMBOGNXHQVGW-UHFFFAOYSA-M PubChem CID: 516892 ChEBI: CHEBI:32139 IUPAC Name: sodium;hydrogen carbonate SMILES: [Na+].OC([O-])=O

Pricing & Availability
Specifications

PubChem CID	516892
CAS	144-55-8
Molecular Weight (g/mol)	84.01
ChEBI	CHEBI:32139
MDL Number	MFCD00003528
SMILES	[Na+].OC([O-])=O
IUPAC Name	sodium;hydrogen carbonate
InChI Key	UIIMBOGNXHQVGW-UHFFFAOYSA-M
Molecular Formula	CHNaO3

426

Buffer, Reference Standard, pH 12.45 ± 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	12.45
Concentration	1X
Shelf Life	18 months
For Use With (Application)	Calibration
Solution Type	pH Buffer
CAS Max %	0.37

427

Potassium Permanganate, 0.100 N (N/10), 0.0200 M (M/50), Ricca Tightrant™

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428

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Thermo Scientific Chemicals PIPES, 98.5+%, for biochemistry

CAS: 5625-37-6 Molecular Formula: C8H18N2O6S2 Molecular Weight (g/mol): 302.36 InChI Key: IHPYMWDTONKSCO-UHFFFAOYSA-N Synonym: 1, 4-Piperazinebis(ethanesulfonic acid) PubChem CID: 79723 ChEBI: CHEBI:44933 IUPAC Name: 2-[4-(2-sulfoethyl)piperazin-1-yl]ethanesulfonic acid SMILES: C1CN(CCN1CCS(=O)(=O)O)CCS(=O)(=O)O

Pricing & Availability
Specifications

PubChem CID	79723
CAS	5625-37-6
Molecular Weight (g/mol)	302.36
ChEBI	CHEBI:44933
SMILES	C1CN(CCN1CCS(=O)(=O)O)CCS(=O)(=O)O
Synonym	1, 4-Piperazinebis(ethanesulfonic acid)
IUPAC Name	2-[4-(2-sulfoethyl)piperazin-1-yl]ethanesulfonic acid
InChI Key	IHPYMWDTONKSCO-UHFFFAOYSA-N
Molecular Formula	C8H18N2O6S2

429

Color Standard, Pt-Co, 500 Units APHA, Stock Solution, Certified, LabChem™

Pricing & Availability
Specifications

Linear Formula	K₂(PtCl₆)
Solubility	Soluble in water
Color	Orange
Physical Form	Liquid
UN Number	UN1789
Chemical Name or Material	Color Standard
Grade	Certified
Identification	Passes Test
Name Note	Pt-Co, 500 Units APHA, Stock Solution
CAS	7732-18-5
Health Hazard 3	GHS P Statement Obtain special instructions before use. Do not handle until all safety precautions have been read and understood. Do not breathe mist, vapors, spray. Contaminated work clothing must not be allowed out of the workplace. Wear protective gloves, eye protection, protective clothing, face protection. Wear respiratory protection. Wash exposed skin thoroughly after handling. If swallowed: Rinse mouth. Do not induce vomiting. Immediately call a poison center/doctor. If on skin (or hair): Remove immediately all contaminated clothing. Rinse skin with water/shower. Immediately call a poison center/doctor. Wash contaminated clothing before reuse. If inhaled: Remove person to fresh air and keep comfortable for breathing. Immediately call a poison center/doctor. If in eyes: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. Immediately call a poison center/doctor. Store locked up. Dispose of contents/container to comply with local, state and federal regulations.
Health Hazard 2	GHS H Statement Causes severe skin burns and eye damage. May cause an allergic skin reaction. May cause allergy or asthma symptoms or breathing difficulties if inhaled. May cause cancer. May damage fertility or the unborn child.
Health Hazard 1	Danger
Packaging	Amber Glass
Recommended Storage	Room Temperature
Formula Weight	485.99
CAS Max %	0.1

430

Potassium dichromate, 0.1N Standardized Solution

CAS: 7778-50-9 Molecular Formula: Cr2K2O7 Molecular Weight (g/mol): 294.182 MDL Number: MFCD00011367 InChI Key: KMUONIBRACKNSN-UHFFFAOYSA-N PubChem CID: 24502 ChEBI: CHEBI:53444 IUPAC Name: dipotassium;oxido-(oxido(dioxo)chromio)oxy-dioxochromium SMILES: [O-][Cr](=O)(=O)O[Cr](=O)(=O)[O-].[K+].[K+]

Pricing & Availability
Specifications

PubChem CID	24502
CAS	7778-50-9
Molecular Weight (g/mol)	294.182
ChEBI	CHEBI:53444
MDL Number	MFCD00011367
SMILES	[O-][Cr](=O)(=O)O[Cr](=O)(=O)[O-].[K+].[K+]
IUPAC Name	dipotassium;oxido-(oxido(dioxo)chromio)oxy-dioxochromium
InChI Key	KMUONIBRACKNSN-UHFFFAOYSA-N
Molecular Formula	Cr2K2O7

431

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Atrazine, 95+%

CAS: 1912-24-9 Molecular Formula: C8H14ClN5 Molecular Weight (g/mol): 215.69 MDL Number: MFCD00041810 InChI Key: MXWJVTOOROXGIU-UHFFFAOYSA-N IUPAC Name: 6-chloro-N2-ethyl-N4-(propan-2-yl)-1,3,5-triazine-2,4-diamine SMILES: CCNC1=NC(Cl)=NC(NC(C)C)=N1

Pricing & Availability
Specifications

CAS	1912-24-9
Molecular Weight (g/mol)	215.69
MDL Number	MFCD00041810
SMILES	CCNC1=NC(Cl)=NC(NC(C)C)=N1
IUPAC Name	6-chloro-N2-ethyl-N4-(propan-2-yl)-1,3,5-triazine-2,4-diamine
InChI Key	MXWJVTOOROXGIU-UHFFFAOYSA-N
Molecular Formula	C8H14ClN5

432

EP Reference Solution B₉, Brown Reference Solution, Ricca Chemical

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433

Sodium bicarbonate, 1M buffer soln., pH 8.0, Thermo Scientific Chemicals

CAS: 144-55-8 Molecular Formula: CHNaO3 Molecular Weight (g/mol): 84.01 MDL Number: MFCD00003528 InChI Key: UIIMBOGNXHQVGW-UHFFFAOYSA-M PubChem CID: 516892 ChEBI: CHEBI:32139 SMILES: [Na+].OC([O-])=O

Pricing & Availability
Specifications

PubChem CID	516892
CAS	144-55-8
Molecular Weight (g/mol)	84.01
ChEBI	CHEBI:32139
MDL Number	MFCD00003528
SMILES	[Na+].OC([O-])=O
InChI Key	UIIMBOGNXHQVGW-UHFFFAOYSA-M
Molecular Formula	CHNaO3

434

Buffer solution, pH 11.00 (+/-0.026 @ 25oC), No Color, Specpure, NIST Traceable

CAS: 1336-21-6 | H5NO | 35.05 g/mol

Pricing & Availability
Specifications

Molecular Weight (g/mol)	35.05
ChEBI	CHEBI:18219
Color	Colorless
Physical Form	Liquid
Chemical Name or Material	Buffer solution
SMILES	N.O
InChI Key	VHUUQVKOLVNVRT-UHFFFAOYSA-N
PubChem CID	14923
CAS	7732-18-5
MDL Number	MFCD00066650
Solubility Information	Miscible with water.
TSCA	Yes
Recommended Storage	Ambient temperatures
Molecular Formula	H5NO
Odor	Odorless

435

Thermo Scientific Chemicals Sodium phosphate, 0.5M buffer soln., pH 7.5

Pricing & Availability
Specifications

MDL Number	MFCD00146206
Solubility Information	Soluble in water (121mg/ml at 20°C).
Physical Form	Liquid
pH	7.5
Chemical Name or Material	Sodium phosphate buffer soln.
TSCA	Yes
Recommended Storage	Ambient temperatures
Concentration	0.5 M

Buffers and Standards

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Color Standard, Pt-Co, 500 Units APHA, Stock Solution, Certified, LabChem™ GSA/VA ContractAvailable on GSA/VA contract for Federal Government customers.Learn More

Color Standard, Pt-Co, 500 Units APHA, Stock Solution, Certified, LabChem™