Learn More
Primary Opalescent Suspension, EP Grade, Reagecon™
Shop All Reagecon Products

Description
This Primary Opalescence Suspension is a ready-to-use turbidity standard presented in high-quality, tamper-evident bottles for use in calibrating turbidimeters and nephelometers and for controlling the reproducibility of their measurements.
This product is a formazin suspension prepared with equal parts hexamethylenetetramine solution and hydrazine sulphate solution. Aqueous formazine solutions feature small, uniform colloidal particles that scatter light in all directions, causing opalescence.
- Manufactured according to European Pharmocopoeia Chapter 2(2.2.1) guidelines with a Balance Certificate of Calibration issued in accordance with ISO 17025
- Prepared gravimetrically on a weight/weight basis using OIML traceable weights
- Concentration verified using a high-performance spectrophotometer calibrated using ISO Guide 34 accredited spectrophotometric standards
- The Primary Opalescence Suspension diluted in precise ratios to form the EP Reference Opalescence Suspensions (I, II, III, IV)
Specifications
Specifications
Chemical Name or Material | Formazin suspension |
Description | Opalescence value = 4000 NTU |
CAS | 100-97-0, 10034-93-2, 7732-18-5 |
Certificate of Analysis | Yes |
Analyte or Component Names | Hexamethylenetetramine solution + Hydrazine sulphate solution |
Physical Form | Liquid Suspension |
Synonym | Formazin suspension |
Element | Hexamethylenetetramine, Hydrazine Sulphate |
Quantity | 100 mL |
Grade | Eu. Ph. Chapter 2 |
Safety and Handling


- PRIMARY OPALESCENT SOLUTION
- Danger
- Skin sensitiser Category 1
- Carcinogenicity Category 1B
- Skin sensitiser Category 1
- H317-May cause an allergic skin reaction.
- H350-May cause cancer.
- P261-Avoid breathing dust/fume/gas/mist/vapours/spray.
- P280-Wear protective gloves/protective clothing/eye protection/face protection.
- P321-Specific treatment (see on this label).
- P333+P313-If skin irritation or rash occurs: Get medical advice/attention.
- P405-Store locked up.
- P501b-Dispose of contents/container in accordance with local/regional/national/international regulations.
- MIXTURE LIST-Contains : methenamine, hydrazinium(2+) sulphate
Your input is important to us. Please complete this form to provide feedback related to the content on this product.