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Primary Opalescent Suspension, EP Grade, Reagecon™

Used to calibrate, control, qualify and validate turbidimeters and nephelometers. Primary Opalescent Suspension, EP Grade, Reagecon™ is a ready-to-use formazin suspension with an opalescent value of 4000 NTU. It is designed for use as a turbidity standard in accordance with Eu. Ph. Chapter 2.

Brand:  Reagecon EPPOS01

Additional Details : CAS Number : 100-97-0 Weight : 0.10000kg

Product Code. 11835853

  • 1485.00 SEK / 100mL
Estimated Shipment: 08-07-2024
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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)


Opalescence value = 4000 NTU
Eu. Ph. Chapter 2
Liquid Suspension
Formazin suspension
100 mL
Formazin suspension
Hexamethylenetetramine solution + Hydrazine sulphate solution
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Safety and Handling

Safety and Handling

Product Identifier

Signal Word
  • Danger

Hazard Category
  • Skin sensitiser Category 1
  • Carcinogenicity Category 1B
  • Skin sensitiser Category 1

Hazard Statement
  • H317-May cause an allergic skin reaction.
  • H350-May cause cancer.

Precautionary Statement
  • 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.

Supplemental information
  • MIXTURE LIST-Contains : methenamine, hydrazinium(2+) sulphate



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