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Buffers and Standards

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 (785)
Spectroscopy Standards (669)
Karl Fischer Buffers and Reagents (192)
Electrochemistry Buffers (148)
General Chemistry Solutions (88)
Environmental Testing Standards (8)
Life Science Buffers (2)

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1 – 15 of 1,579 results
1

Buffer solution pH 9.0 (20°C), Buffer solution pH 9.0 (20°C), Honeywell Fluka™

CAS: 1336-21-6 Molecular Formula: H5NO Molecular Weight (g/mol): 35.05 InChI Key: VHUUQVKOLVNVRT-UHFFFAOYSA-N PubChem CID: 14923 ChEBI: CHEBI:18219 SMILES: N.O

Promotions are available
PubChem CID 14923
CAS 1336-21-6
Molecular Weight (g/mol) 35.05
ChEBI CHEBI:18219
SMILES N.O
InChI Key VHUUQVKOLVNVRT-UHFFFAOYSA-N
Molecular Formula H5NO
3

Buffer solution, 12.0, di-sodium hydrogen phosphate / sodium hydroxide solution, Honeywell Fluka™

CAS: 1336-21-6 Molecular Formula: H5NO Molecular Weight (g/mol): 35.05 MDL Number: MFCD00066650 InChI Key: VHUUQVKOLVNVRT-UHFFFAOYSA-N PubChem CID: 14923 ChEBI: CHEBI:18219 IUPAC Name: azanium;hydroxide SMILES: N.O

Promotions are available
PubChem CID 14923
CAS 1336-21-6
Molecular Weight (g/mol) 35.05
ChEBI CHEBI:18219
MDL Number MFCD00066650
SMILES N.O
IUPAC Name azanium;hydroxide
InChI Key VHUUQVKOLVNVRT-UHFFFAOYSA-N
Molecular Formula H5NO
4

HYDRANAL™ - Composite 5, Honeywell Fluka™

Titrating agent for volumetric, one-component Karl Fischer titrations (Methanol-free)

Boiling Point 194°C (at 1.013 hPa)
CAS 111-90-0
Color Brown
Solubility Information Completely Miscible in Water
Physical Form Liquid
Packaging Metrohm OMNIS Smart Reagent
pH 4.5 to 5.5 (at 20°C)
Flash Point 99°C
Chemical Name or Material HYDRANAL™ - Composite 5
Grade Volumetric One-Component KF Titration
Synonym DE Solvent; 2-(2-Ethoxyethoxy)ethanol; CARBITOL; Diethylene glycol ethyl ether; Ethyldiglycol
Recommended Storage Ambient
5

Buffer Solution pH 7.0 (20°C), Potassium Dihydrogen Phosphate / Disodium Hydrogen Phosphate, Traceable to SRM from NIST, with Fungicide, Honeywell Fluka™

CAS: 1336-21-6 Molecular Formula: H5NO Molecular Weight (g/mol): 35.05 InChI Key: VHUUQVKOLVNVRT-UHFFFAOYSA-N PubChem CID: 14923 ChEBI: CHEBI:18219 SMILES: N.O

Promotions are available
PubChem CID 14923
CAS 1336-21-6
Molecular Weight (g/mol) 35.05
ChEBI CHEBI:18219
SMILES N.O
InChI Key VHUUQVKOLVNVRT-UHFFFAOYSA-N
Molecular Formula H5NO
6

Buffer solution pH 4.0 (20°C), Red colored, citric acid / sodium hydroxide / sodium chloride solution, with fungicide, Honeywell Fluka™

CAS: 1336-21-6 Molecular Formula: H5NO Molecular Weight (g/mol): 35.05 MDL Number: MFCD00066650 InChI Key: VHUUQVKOLVNVRT-UHFFFAOYSA-N PubChem CID: 14923 ChEBI: CHEBI:18219 SMILES: N.O

Promotions are available
PubChem CID 14923
CAS 1336-21-6
Molecular Weight (g/mol) 35.05
ChEBI CHEBI:18219
MDL Number MFCD00066650
SMILES N.O
InChI Key VHUUQVKOLVNVRT-UHFFFAOYSA-N
Molecular Formula H5NO
7

HYDRANAL™-Water Standard KF-Oven, 150-160°C, Honeywell Fluka™

Standard for Karl Fischer oven check (water content ∼5.0%, exact value on report of analysis)

13

HYDRANAL™-Sodium tartrate dihydrate, Honeywell Fluka™

Test substance for volumetric Karl Fischer titration (water content ∼15.66%, exact value on report of analysis)

UN Number NONH for all modes of transport
Chemical Name or Material HYDRANAL™-Sodium tartrate dihydrate
15

HYDRANAL™-Buffer Base, Honeywell Fluka™

Liquid buffer medium for Karl Fischer titration in alkaline samples (based on salicylic acid)

CAS 121-44-8
MDL Number MFCD00147178
Health Hazard 2 P210-P280-P304 + P340 + P312-P305 + P351 + P338 + P310-P370 + P378-P403 + P235
Flash Point 11°C (51.8°F)
UN Number UN1993BE
Chemical Name or Material HYDRANAL™-Buffer Base