HI-70004P

HI-70004P is a premium quality pH 4.01 calibration buffer solution (25 sachets containing 20mL buffer). HI70004P is a 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 ±0.01pH at 25℃ and are traceable to NIST Standard Reference Materials (SRMs).

• Each sachet has the lot number and expiration date stamped on it
• Light block packaging prevents oxidation from UV light that could alter the buffer value
• Specially formulated to have an expiration of 5 years from manufacture for an unopened sachet
• Colour coded label for easy pH buffer value identification
• Temperature chart of the actual pH value at various temperatures printed on each sachet
• Ideal for users that do not calibrate frequently and field use due to portability