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)

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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

1,366 – 1,380 of 43,645 results

1,366

CERILLIANT™ Methylphenidate Hydrochloride Solution, (Racemic mixture), Sold by MilliporeSigma™ Supelco™

Certified reference material

Pricing & Availability

1,367

CERILLIANT™ GHB-d6 sodium salt Solution, 100 μg/mL in Methanol (as salt), Sold by MilliporeSigma™ Supelco™

Certified reference material

Pricing & Availability

1,368

CERILLIANT™ 3-Methoxytyramine Hydrochloride, 1.0 mg/mL in Methanol (as free base), Sold by MilliporeSigma™ Supelco™

Certified reference material

Pricing & Availability

1,369

CERILLIANT™ (+/-)-11-nor-9-Carboxy-Delta9-THC-D3 Solution, 1.0 mg/mL in Methanol, Sold by MilliporeSigma™ Supelco™

Certified reference material

Pricing & Availability

1,370

CERILLIANT™ Tapentadol-beta-D-glucuronide Solution, 100 μg/mL in Acetonitrile:Water, Sold by MilliporeSigma™ Supelco™

Certified reference material

Pricing & Availability

1,371

Bromine Water, Saturated Solution, Spectrum™ Chemical

Pricing & Availability
Specifications

CAS	7726-95-6

1,372

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

1,373

Ammonium thioglycolate, 70 wt.% solution in water

Ammonium thioglycolate, 68.0 to 72.0%, C2H7NO2S, CAS Number-5421-46-5, 7732-18-5 | CAS: 5421-46-5 | C2H7NO2S | 109.143 g/mol

Pricing & Availability
Specifications

Molecular Weight (g/mol)	109.143
Identification	ammonium: positive, mercaptane: positive
InChI Key	ZZTCCAPMZLDHFM-UHFFFAOYSA-N
Density	1.2200g/mL
PubChem CID	21534
Name Note	70 wt.% solution in water
Percent Purity	68.0 to 72.0%
pH	5.8 to 6.4
Formula Weight	109.15
Melting Point	-20.0°C
Boiling Point	115.0°C
Color	Colorless
Physical Form	Solution
Chemical Name or Material	Ammonium thioglycolate
SMILES	C(C(=O)[O-])S.[NH4+]
CAS	7732-18-5
Health Hazard 3	GHS P Statement: Wear protective gloves/protective clothing/eye protection/face protection. IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician. 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	MFCD00137451
Health Hazard 2	GHS H Statement: May cause an allergic skin reaction. Toxic if swallowed. May be corrosive to metals.
Packaging	Glass bottle
Solubility Information	Solubility in water: completely soluble.
Health Hazard 1	GHS Signal Word: Danger
Synonym	ammonium thioglycolate,ammonium mercaptoacetate,acetic acid, mercapto-, monoammonium salt,thiofaco a-50,ammonium thioglycollate,thioglycolic acid ammonium salt,usaf mo-2,unii-6p9e788vzz,thioglycollic acid, ammonium salt,ammonium 2-mercaptoacetate
IUPAC Name	azanium;2-sulfanylacetate
Molecular Formula	C2H7NO2S
Specific Gravity	1.22

1,374

CERILLIANT™ Pentobarbital-D5 Solution, 100 μg/mL in Methanol, Sold by MilliporeSigma™ Supelco™

Certified reference material

Pricing & Availability

1,375

2-Propanol, Certified Reference Material, MilliporeSigma™ Supelco™

Pharmaceutical secondary standard for application in quality control. Provides pharma laboratories and manufacturers with a convenient, and cost-effective alternative to the preparation of in-house working standards.

Pricing & Availability

1,376

Piperitone, ≥98.0% (mixture of enantiomers, predominantly (-)-enantiomer, GC), MilliporeSigma™ Supelco™

Piperitone is a monocyclic monoterpenoid, which occurs in eucalyptus oil. It is a good source of menthone and thymol.

Pricing & Availability

1,377

Brilliant Green, ≥98.0% (HPLC), MilliporeSigma™ Supelco™

Brilliant green is a triphenylmethane dye, found to be toxic to humans and animals. It is widely used in dying wool, leather, silk, jute, and cotton. It is also used in the manufacturing of green ink, as a staining constituent of bacteriological media.

Pricing & Availability

1,378

phyproof™ N-trans-p-Coumaroyltyramine, ≥95% (HPLC), MilliporeSigma™ Supelco™

This substance is supplied with certified chromatographic purity. The exact value can be found on the certificate. Produced by PhytoLab GmbH & Co. KG

Pricing & Availability

1,379

phyproof™ Limonin, ≥95% (HPLC), MilliporeSigma™ Supelco™

Limonin may be used in assays to quantify limonin in citrus products. It may also be used in other assays as a control, standard, or competitor or in studies on the physiology, metabolism, and biosynthesis of limonin.

Pricing & Availability

1,380

2-Butanone, ≥99.9% (GC), MilliporeSigma™ Supelco™

Pricing & Availability

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Buffers and Standards

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Bromine Water, Saturated Solution, Spectrum™ Chemical Small and Specialty Supplier PartnerSmall and/or specialty supplier based on Federal laws and SBA requirements.Learn More

Bromine Water, Saturated Solution, Spectrum™ Chemical