Reconstituted Freshwater for Ecotoxicity Tests (ISO 6341, US EPA) BZ638
Product Code: BZ638
Manufacturer: Biochemazone
Available Pack Sizes: 1 L, 5 L, 10 L, 20 L
Custom Bulk Quantities Available
Product Overview
Biochemazone Reconstituted Freshwater BZ638 is synthetic dilution and culture water for aquatic toxicity tests with Daphnia, fish and algae. Using a defined reconstituted water instead of natural water removes an important source of variation between tests and laboratories.
Three waters are offered. ISO 6341 test water (calcium chloride, magnesium sulfate, sodium bicarbonate and potassium chloride) has a pH of 7.8 ± 0.2 and a hardness of about 250 mg/L as CaCO₃; it is also accepted as dilution water in OECD 202. US EPA moderately hard water has a pH of 7.4–7.8 and a hardness of 80–100 mg/L; US EPA hard water has a pH of 7.6–8.0 and a hardness of 160–180 mg/L.
Aerate the water before use until the pH and dissolved oxygen are stable. Measured pH, hardness and conductivity are reported for each batch. Each batch is prepared with ISO 3696 compliant high-purity water under Biochemazone’s ISO 9001 / GMP quality system.
Key Features & Benefits
✅ Three Standard Waters – ISO 6341, EPA moderately hard, EPA hard
✅ pH 7.4 to 8.0 – Stated for each water
✅ Hardness Verified – Reported on each certificate
✅ OECD 202 Accepted – ISO water as dilution water
✅ No Chlorine or Metals – Free of contaminants found in tap water
✅ Up to 20 L – For culture and test series
✅ ISO 3696 Grade Water – Prepared using high-purity laboratory water
✅ Made in Canada – Manufactured under ISO 9001 / GMP quality systems
Applications
🦐 Invertebrate Toxicity Tests
• Daphnia acute immobilisation (ISO 6341, OECD 202)
• Ceriodaphnia and Daphnia culture
🐟 Fish and Algae Tests
• Fish acute toxicity dilution water
• Effluent and whole-effluent toxicity testing
🧪 Chemical Registration
• GLP ecotoxicology studies
• Reference-toxicant control charts
Usage Areas
- Ecotoxicology and GLP laboratories
- Environmental consultancies
- Chemical and pesticide manufacturers
- Water authorities
- Universities
Typical Properties
- Appearance: Clear, colourless liquid
- pH: ISO 6341: 7.8 ± 0.2; EPA moderately hard: 7.4–7.8; EPA hard: 7.6–8.0
- Hardness (as CaCO₃): about 250 mg/L (ISO); 80–100 mg/L (EPA moderately hard); 160–180 mg/L (EPA hard)
- Composition: Reagent-grade salts in purified water
Storage & Stability
- Storage Temperature: 2–30 °C
- Shelf Life: 1 year for unopened bottles
- Shipping: Room temperature
- Aerate and bring to test temperature before use
Customization Options
- EPA very soft, soft and very hard waters
- Elendt M4 and M7 media
- 10x concentrates
- Carboys for culture facilities
Ordering Information
BZ638 is available in standard laboratory sizes or OEM/bulk supply formats.
📄 MSDS, Technical Datasheet, and Certificate of Analysis (CoA) available upon request
📧 Email: info@biochemazone.com
🌐 Website: www.biochemazone.com
⚠️ For laboratory testing only. Not for drinking.
