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 (24,091)

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General Chemistry Solutions (5,050)

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Life Science Buffers (4,155)

Electrochemistry Buffers (2,349)

Environmental Testing Standards (1,844)

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Karl Fischer Buffers and Reagents (470)

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Viscosity Standards (250)

Quality Control and Proficiency Samples (180)

Kjeldahl Buffers and Reagents (90)

Gel Filtration Standards (57)

Matrix Modifiers (29)

Osmolality Standards (12)

Smoke Point Reference (10)

Polarimetric Standards (6)

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Grade

AAS (66)
ACS (58)
ACS Reagent (25)
ACS/ASTM E 200/AOAC/EPA (7)
ACS/ASTM E 200/AOAC/USP Volumetric (5)
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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1,336 – 1,350 of 44,437 results

1,336

Multi-Element Plasma Standard Solution 2, Specpure™

Pricing & Availability

1,337

MilliporeSigma™ PIPES, Sodium Salt, Molecular biology grade, OmniPur™, Calbiochem™,

CAS: 100037-69-2 Molecular Formula: C16H33N4Na3O12S4 Molecular Weight (g/mol): 670.665 InChI Key: FPDACHMSOMILQI-UHFFFAOYSA-K PubChem CID: 3086462 IUPAC Name: trisodium;2-[4-(2-sulfoethyl)piperazin-1-yl]ethanesulfonate;2-[4-(2-sulfonatoethyl)piperazin-1-yl]ethanesulfonate SMILES: C1CN(CCN1CCS(=O)(=O)O)CCS(=O)(=O)[O-].C1CN(CCN1CCS(=O)(=O)[O-])CCS(=O)(=O)[O-].[Na+].[Na+].[Na+]

Pricing & Availability
Specifications

PubChem CID	3086462
CAS	100037-69-2
Molecular Weight (g/mol)	670.665
SMILES	C1CN(CCN1CCS(=O)(=O)O)CCS(=O)(=O)[O-].C1CN(CCN1CCS(=O)(=O)[O-])CCS(=O)(=O)[O-].[Na+].[Na+].[Na+]
IUPAC Name	trisodium;2-[4-(2-sulfoethyl)piperazin-1-yl]ethanesulfonate;2-[4-(2-sulfonatoethyl)piperazin-1-yl]ethanesulfonate
InChI Key	FPDACHMSOMILQI-UHFFFAOYSA-K
Molecular Formula	C16H33N4Na3O12S4

1,338

Calcium, plasma standard solution, Specpure™ Ca 1000μg/mL

CAS: 471-34-1 Molecular Formula: CCaO3 Molecular Weight (g/mol): 100.09 MDL Number: MFCD00010906 InChI Key: VTYYLEPIZMXCLO-UHFFFAOYSA-L PubChem CID: 10112 ChEBI: CHEBI:3311 SMILES: [Ca++].[O-]C([O-])=O

Pricing & Availability
Specifications

PubChem CID	10112
CAS	471-34-1
Molecular Weight (g/mol)	100.09
ChEBI	CHEBI:3311
MDL Number	MFCD00010906
SMILES	[Ca++].[O-]C([O-])=O
InChI Key	VTYYLEPIZMXCLO-UHFFFAOYSA-L
Molecular Formula	CCaO3

1,339

Thallium, plasma standard solution, Specpure™ Tl 1000μg/mL

MDL Number: MFCD00134063

Pricing & Availability
Specifications

MDL Number	MFCD00134063

1,340

Silver, Oil based standard solution, Specpure, Ag 1000

MDL Number: MFCD00003397

Pricing & Availability
Specifications

MDL Number	MFCD00003397

1,341

Cadmium, Oil based standard solution, Specpure™ Cd 1000μg/g

MDL Number: MFCD00010914

Pricing & Availability
Specifications

MDL Number	MFCD00010914

1,342

Molybdenum, Oil based standard solution, Specpure™ Mo 1000μg/g

MDL Number: MFCD00003465

Pricing & Availability
Specifications

MDL Number	MFCD00003465

1,343

Boron, Oil based standard solution, Specpure™ B 1000μg/g

MDL Number: MFCD00134034

Pricing & Availability
Specifications

MDL Number	MFCD00134034

1,344

Iron, Oil based standard solution, Specpure™ Fe 1000μg/g

MDL Number: MFCD00010999

Pricing & Availability
Specifications

MDL Number	MFCD00010999

1,345

Strontium, Oil based standard solution, Specpure™ Sr 1000μg/g

MDL Number: MFCD00134060

Pricing & Availability
Specifications

MDL Number	MFCD00134060

1,346

Sulfur, Oil based standard solution, Specpure™ S 1000μg/g

MDL Number: MFCD00242296

Pricing & Availability
Specifications

MDL Number	MFCD00242296

1,347

Dilithium tetrachlorocuprate, 0.1M solution in THF

CAS: 15489-27-7 | Cl4CuLi2 | 219.226 g/mol

Pricing & Availability
Specifications

Linear Formula	Li₂CuCl₄
Molecular Weight (g/mol)	219.226
Color	Colorless
Physical Form	Liquid
Chemical Name or Material	Dilithium tetrachlorocuprate
SMILES	[Li+].[Li+].Cl[Cu-2](Cl)(Cl)Cl
Concentration	0.09 to 0.12M
InChI Key	HCJWWBBBSCXJMS-UHFFFAOYSA-J
Density	0.9100g/mL
PubChem CID	11074879
Name Note	0.1M Solution in THF
Fieser	04,163; 05,226; 06,203; 07,114; 08,176; 11,190; 12,195
CAS	109-99-9
Health Hazard 3	GHS P Statement Keep away from heat/sparks/open flames/hot surfaces. - No smoking. IF ON SKIN (or hair): Take off immediately all contaminated clothing. Rinse skin with water/shower. IF SWALLOWED: rinse mouth. Do NOT induce vomiting. Call a POISON CENTER or doctor/physician if you feel unwell. Wash face, hands and any exposed skin thoroughly after handling. If eye irritation persists: Get medical advice/attention. IF INHALED: Remove to fresh air and keep at rest in a position comfortable for breathing. Wear protective gloves/protective clothing/eye protection/face protection.
MDL Number	MFCD00011081
Health Hazard 2	GHS H Statement May cause respiratory irritation. Causes serious eye irritation. Highly flammable liquid and vapor. May form explosive peroxides. Suspected of causing cancer. Harmful if swallowed. May cause drowsiness or dizziness.
Flash Point	−17°C
Packaging	Glass bottle
Health Hazard 1	Danger
IUPAC Name	dilithium;tetrachlorocopper(2-)
Molecular Formula	Cl4CuLi2
Formula Weight	219.24
Specific Gravity	0.91

1,348

ICP-MS Stock Standard solution B for 200.8, Specpure™

Pricing & Availability

1,349

MilliporeSigma™ Tris, Hydrochloride, ULTROL™ Grade, Calbiochem™,

CAS: 1185-53-1 Molecular Formula: C4H12ClNO3 Molecular Weight (g/mol): 157.594 InChI Key: QKNYBSVHEMOAJP-UHFFFAOYSA-N Synonym: tris(Hydroxymethyl)aminomethane, HCl PubChem CID: 93573 IUPAC Name: 2-amino-2-(hydroxymethyl)propane-1,3-diol;hydrochloride SMILES: C(C(CO)(CO)N)O.Cl

Pricing & Availability
Specifications

PubChem CID	93573
CAS	1185-53-1
Molecular Weight (g/mol)	157.594
SMILES	C(C(CO)(CO)N)O.Cl
Synonym	tris(Hydroxymethyl)aminomethane, HCl
IUPAC Name	2-amino-2-(hydroxymethyl)propane-1,3-diol;hydrochloride
InChI Key	QKNYBSVHEMOAJP-UHFFFAOYSA-N
Molecular Formula	C4H12ClNO3

1,350

CERILLIANT™ Vitamin D3 Solution, 1 mg/mL in Ethanol, Sold by MilliporeSigma™ Supelco™

Certified reference material

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Buffers and Standards

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