Description
Specifications Table
Product Name – Density standard, 0.6878 g/ml at 25 °C
Quantity/Pack Size – 100 ml
Form – Liquid
Grade – NIST-traceable, analytical grade
Application – Density meter calibration, volumetric equipment testing
Product Overview
The density standard 0.6878 g/ml at 25°C is a precision-formulated liquid designed for calibrating density meters, hydrometers, and other volumetric lab equipment. Manufactured under strict quality controls, this NIST-traceable standard ensures ±0.0002 g/ml accuracy, making it ideal for applications requiring high repeatability. The solution is stabilized to prevent evaporation and composition changes over time, maintaining its certified density value throughout its shelf life. Packaged in a leak-proof HDPE bottle with a tamper-evident seal, it eliminates contamination risks during storage or handling. The low thermal expansion coefficient minimizes temperature-induced density variations, while the color-coded label allows quick identification in multi-standard setups. Compatible with most organic solvent-resistant materials, this standard requires no preparation—simply use as received for immediate calibration. Its non-hazardous formulation meets international safety standards, reducing disposal complexities in regulated environments.
FAQs
1. What is the shelf life of this density standard after opening?
When stored in its original container at 15-25°C, the standard maintains its certified density for 24 months after opening, provided the bottle is resealed tightly after each use to prevent solvent evaporation.
2. Can this standard be used with automatic density meters?
Yes, the 0.6878 g/ml standard is compatible with all major brands of automatic density meters, including Anton Paar, Mettler Toledo, and Kyoto Electronics, as it meets their viscosity and surface tension requirements for accurate measurements.
3. How does temperature affect the stated density value?
The certified value of 0.6878 g/ml is valid at exactly 25°C. For every 1°C deviation, the density changes by approximately 0.001 g/ml. Use the temperature correction table provided with your density meter for adjustments.
4. What cleaning procedure is recommended before using this standard?
Rinse the measuring cell or hydrometer with isopropyl alcohol (70%) followed by distilled water, then dry with lint-free tissue. For automatic density meters, perform three rinse cycles with the standard itself before taking measurements.
5. Are there alternative density values available in the same solvent system?
This standard is part of a series covering 0.6800–0.7000 g/ml range in 0.005 g/ml increments. The solvent base remains consistent across the series to ensure compatibility when using multiple standards for calibration curves.
