HI7004/1G is a premium quality pH 4.01 calibration buffer produced in accordance with ISO 3696/BS3978 standards using high purity salts, deionized water, certified weight-checked balances, and Class A glassware in a temperature controlled environment monitored with certified thermometers. Reported values are accurate to +/- 0.01 pH @ 25°C and are traceable to NIST Standard Reference Materials (SRMs).
Air tight bottle with tamper-proof seal
Ensures quality and freshness of solution
Each bottle marked with lot number and expiration date.
Hanna buffers are specially formulated to have an expiration of 5 years from manufacture for an unopened bottle.
This pH 4.01 buffer solution is dyed red for easy identification
- Easy to identify which buffer is being used for calibration
Description standard calibration buffer, dyed Certificate of Analysis no pH Accuracy ±0.01 pH pH Value @ 25°C 4.01 Package bottle Quantity 1 Size 1 gallon (3.78 L)