Description
Specifications Table
Product Name – Density standard, 1.5685 g/ml at 40 °C
Quantity/Pack Size – 100 ml
Form – Liquid
Grade – Certified Reference Material (CRM)
Application – Density calibration, hydrometer testing, volumetric equipment verification
Product Overview
This density standard (1.5685 g/ml at 40°C) is a high-precision reference material engineered for laboratory calibration where exact density values are critical. Formulated using ultra-pure solvents and stabilized against evaporation, it delivers NIST-traceable accuracy with a tolerance of ±0.0002 g/ml, ensuring compliance with ISO 9001 and GLP standards. The solution is packaged in amber glass bottles with PTFE-lined caps to prevent contamination and degradation from light or moisture. Its low thermal expansion coefficient minimizes temperature-induced variability, making it ideal for environments where ambient conditions fluctuate. The standard undergoes rigorous batch testing via pycnometer methods and includes a Certificate of Analysis (CoA) with lot-specific data for audit trails. Compatible with automatic density meters, digital hydrometers, and manual glassware, it eliminates systematic errors in routine density determinations. The 100 ml pack size balances cost-efficiency with sufficient volume for repeated calibrations, while the non-hazardous composition simplifies handling and disposal. For laboratories requiring traceable, stable density references, this standard provides a reliable benchmark for instrument validation and quality control protocols.
FAQs
1. What is the shelf life of this density standard when stored unopened?
The unopened density standard maintains its certified accuracy for 24 months from the date of manufacture when stored at 15–25°C in its original packaging. Avoid exposure to direct sunlight or temperature extremes.
2. Can this standard be used with automatic density meters from different brands?
Yes, the standard is compatible with all major automatic density meters (e.g., Anton Paar, Mettler Toledo, Rudolph) as it meets ASTM D4052 and ISO 15212 specifications for reference materials. Always verify the instrument’s operating temperature range matches the standard’s 40°C calibration point.
3. How does the temperature coefficient affect measurements if my lab isn’t at exactly 40°C?
The standard includes a temperature correction table in the CoA. For every 1°C deviation from 40°C, the density adjusts by approximately 0.00085 g/ml. Use the provided formula: ρ_T = 1.5685 + [0.00085 × (T – 40)] for accurate compensation.
4. Is this standard suitable for calibrating hydrometers used in petroleum testing?
While primarily designed for general lab use, its precision aligns with ASTM D1298 requirements for petroleum hydrometers. However, for API gravity measurements, a dedicated petroleum density standard (e.g., 0.75–0.85 g/ml range) may be more practical.
5. What alternatives exist if I need a density standard with a different value?
For lower densities, consider our 0.7893 g/ml (ethanol-based) or 0.9982 g/ml (water) standards. For higher densities, our 1.7500 g/ml (chlorobenzene) or 2.9900 g/ml (zinc chloride) standards are available. Contact support for custom formulations outside standard ranges.
