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 (22,800)

Spectroscopy Standards (5,748)

General Chemistry Solutions (5,081)

Matrix Blanks and Standardization Solutions (4,292)

Life Science Buffers (4,123)

Electrochemistry Buffers (2,349)

Environmental Testing Standards (1,887)

Electrochemistry Standards (1,245)

Karl Fischer Buffers and Reagents (467)

Isotope Standards (344)

Viscosity Standards (257)

Quality Control and Proficiency Samples (184)

Kjeldahl Buffers and Reagents (90)

Gel Filtration Standards (59)

Matrix Modifiers (29)

Osmolality Standards (13)

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

≥14% (BF3) (1)
≥30% (RT) (1)
≥30% (titration) (1)
≥35% (RT) (1)
≥40% (3)
≥49% (2)
≥50% (3)

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pH

≥12 to ≤14 (6)
>11.5 (2)
>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 (374)
Buffer, Storage (2)
Calibration (8)
Cleaning (1)
Colored pH Buffer (35)

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Search Within Results

1,606 – 1,620 of 43,645 results

1,606

NIST/DIN Buffer, METTLER TOLEDO

The 250 mL NIST/DIN certified buffer solution with a precise pH is a reliable calibration liquid meeting strict NIST and DIN standards.

Pricing & Availability

1,607

CERILLIANT™ N-Desmethylclozapine Solution, 1.0 mg/mL in Methanol, Sold by MilliporeSigma™ Supelco™

Certified reference material

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1,608

CERILLIANT™ 5-Fluoro PB-22 3-carboxyindole metabolite Solution, 100 μg/mL in Acetonitrile, Sold by MilliporeSigma™ Supelco™

Certified reference material

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1,609

p-Toluenesulfonic acid, pure, 12% in acetic acid

CAS: 104-15-4 | C7H8O3S | 172.198 g/mol

Pricing & Availability
Specifications

Molecular Weight (g/mol)	172.198
ChEBI	CHEBI:27849
InChI Key	JOXIMZWYDAKGHI-UHFFFAOYSA-N
Density	1.0700g/mL
PubChem CID	6101
Name Note	12% in Acetic Acid
Fieser	01,1172; 04,508; 05,673; 06,597; 07,374; 08,488; 09,471; 11,535; 12,507
RTECS Number	XT6300000
Formula Weight	172.2
Boiling Point	116.0°C
Color	Colorless to Yellow
Physical Form	Solution
Chemical Name or Material	p-Toluenesulfonic acid
Grade	Pure
SMILES	CC1=CC=C(C=C1)S(=O)(=O)O
Merck Index	15, 9692
Concentration	11 to 13% (Alkalimetry)
CAS	64-19-7
Health Hazard 3	GHS P Statement: Do not breathe dust/fume/gas/mist/vapors/spray. Wear protective gloves/eye protection/face protection. IF SWALLOWED: Call a POISON CENTER or doctor/physician if you feel unwell. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. Keep away from heat/sparks/open flames/hot surfaces. - No smoking. Keep container tightly closed. WARNING: The information provided on this web site was developed in compliance with European Union (EU) regulations and is correct to the best of our knowledge, information and belief at the date of its publication. The information given is designed only as a guide for safe handling and use. It is not to be considered as either a warranty or quality specification.
MDL Number	MFCD00064387
Health Hazard 2	GHS H Statement: Causes severe skin burns and eye damage. Flammable liquid and vapor.
Flash Point	41°C
Packaging	Glass bottle
Solubility Information	Solubility in water: soluble.
Health Hazard 1	GHS Signal Word: Danger
Refractive Index	1.3825 to 1.3845
Synonym	p-toluenesulfonic acid,p-toluenesulphonic acid,4-toluenesulfonic acid,tosic acid,p-tolylsulfonic acid,toluene-4-sulfonic acid,toluenesulfonic acid,tosylic acid,benzenesulfonic acid, 4-methyl,p-methylbenzenesulfonic acid
TSCA	TSCA
IUPAC Name	4-methylbenzenesulfonic acid
Beilstein	11, 97
Molecular Formula	C7H8O3S
EINECS Number	203-180-0
Specific Gravity	1.07

1,610

CERILLIANT™ XLR-11 Solution, 100 μg/mL in Methanol, Sold by MilliporeSigma™ Supelco™

Certified reference material

Pricing & Availability

1,611

Hydrogen Peroxide Solution AR 30%, Macron Fine Chemicals™ ™

CAS: 7722-84-1 Molecular Formula: H2O2 Molecular Weight (g/mol): 34.014 InChI Key: MHAJPDPJQMAIIY-UHFFFAOYSA-N Synonym: oxydol,perhydrol,superoxol,interox,hydrogen dioxide,inhibine,peroxaan,albone,hioxyl,kastone PubChem CID: 784 ChEBI: CHEBI:16240 IUPAC Name: hydrogen peroxide SMILES: OO

Pricing & Availability
Specifications

PubChem CID	784
CAS	7722-84-1
Molecular Weight (g/mol)	34.014
ChEBI	CHEBI:16240
SMILES	OO
Synonym	oxydol,perhydrol,superoxol,interox,hydrogen dioxide,inhibine,peroxaan,albone,hioxyl,kastone
IUPAC Name	hydrogen peroxide
InChI Key	MHAJPDPJQMAIIY-UHFFFAOYSA-N
Molecular Formula	H2O2

1,612

CERILLIANT™ Loprazolam Solution, 1 mg/mL (Acetonitrile:DMSO (90:10) (v/v)), Sold by MilliporeSigma™ Supelco™

Certified reference material

Pricing & Availability

1,613

CERILLIANT™ 4'-Hydroxydiclofenac-13C6 Solution, 100 μg/mL in Methanol, Sold by MilliporeSigma™ Supelco™

Certified reference material

Pricing & Availability

1,614

D-Glucuronic Acid, Spectrum™ Chemical

CAS: 6556-12-3 Molecular Weight (g/mol): 194.14 g/mol

Pricing & Availability
Specifications

CAS	6556-12-3
Molecular Weight (g/mol)	194.14 g/mol

1,615

CERILLIANT™ (+/-)-Methcathinone-D3 Hydrochloride Solution, 100 μg/mL in Acetonitrile, Sold by MilliporeSigma™ Supelco™

Certified reference material

Pricing & Availability

1,616

CERILLIANT™ Nortilidine Hydrochloride, 1.0 mg/mL in Methanol (as free base), Sold by MilliporeSigma™ Supelco™

Certified reference material

Pricing & Availability

1,617

3,6,9-Trioxaundecanedioic Acid, Spectrum™ Chemical

CAS: 13887-98-4 Molecular Weight (g/mol): 222.19 g/mol

Pricing & Availability
Specifications

CAS	13887-98-4
Molecular Weight (g/mol)	222.19 g/mol

1,618

CERILLIANT™ Interference Mix 1 (For Qualitative Use Only), 100-1, Sold by MilliporeSigma™ Supelco™

Certified reference material

Pricing & Availability

1,619

Barium chloride, 0.5N Standardized Solution

CAS: 10361-37-2 Molecular Formula: BaCl2 Molecular Weight (g/mol): 208.23 MDL Number: MFCD00003445 InChI Key: WDIHJSXYQDMJHN-UHFFFAOYSA-L Synonym: barium chloride,barium dichloride,barium chloride solution,ccris 2286,barium chloride, anhydrous,barium chloride, ultra dry,bariumchlorid,dichlorobarium,dsstox_cid_24508 PubChem CID: 25204 ChEBI: CHEBI:63317 IUPAC Name: barium(2+);dichloride SMILES: [Cl-].[Cl-].[Ba++]

Pricing & Availability
Specifications

PubChem CID	25204
CAS	10361-37-2
Molecular Weight (g/mol)	208.23
ChEBI	CHEBI:63317
MDL Number	MFCD00003445
SMILES	[Cl-].[Cl-].[Ba++]
Synonym	barium chloride,barium dichloride,barium chloride solution,ccris 2286,barium chloride, anhydrous,barium chloride, ultra dry,bariumchlorid,dichlorobarium,dsstox_cid_24508
IUPAC Name	barium(2+);dichloride
InChI Key	WDIHJSXYQDMJHN-UHFFFAOYSA-L
Molecular Formula	BaCl2

1,620

CERILLIANT™ (+/-)-MBDB Hydrochloride, 1.0 mg/mL in Methanol (as free base), Sold by MilliporeSigma™ Supelco™

Certified reference material

Pricing & Availability

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Buffers and Standards

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D-Glucuronic Acid, Spectrum™ Chemical Small and Specialty Supplier PartnerSmall and/or specialty supplier based on Federal laws and SBA requirements.Learn More

3,6,9-Trioxaundecanedioic Acid, Spectrum™ Chemical Small and Specialty Supplier PartnerSmall and/or specialty supplier based on Federal laws and SBA requirements.Learn More

D-Glucuronic Acid, Spectrum™ Chemical

3,6,9-Trioxaundecanedioic Acid, Spectrum™ Chemical