Standard pH4.01 Powder

Precision Acidic pH Calibration Buffer: Formulated to yield an exact reference standard of pH 4.01 (at 25°C) for precise acidic range pH electrode calibration.

Pre-Measured Powder Sachet: Sealed in a moisture-proof foil packet to prevent contamination and eliminate manual chemical weighing errors.

Standard 250mL Preparation Volume: Formulated to dissolve into 250mL of distilled or deionized water to create a stable reference buffer solution.

Predictable Thermal Reference Curve: Features clear temperature-dependence reference values to enable accurate calibration across varying liquid testing temperatures.

NIST-Traceable Purity Standard: Manufactured under strict quality controls to guarantee consistent, highly reproducible laboratory and field calibration results.

Chemical Composition: High-purity potassium hydrogen phthalate (KHP) buffer powder mixture sealed in an airtight foil packet.

Technical Specifications:

Target Buffer Value: pH 4.01 ±0.01 @ 25°C.

Solution Yield: 250 mL per sachet.

Product Weight: 0.05 kg.

Form Factor: Fine white powder in sealed foil sachet.

Usage Advice: Dissolve the entire packet contents into a clean 250mL volumetric flask with distilled water, stir thoroughly until dissolved, and submerge your pH electrode tip.

Maintenance: Keep sealed sachets stored in a cool, dry place; store prepared liquid buffer solutions in tightly sealed glass or plastic containers away from air exposure.

Essential Acidic Calibration Standard: Position as a critical calibration consumable for digital pH pens, laboratory glass electrodes, and automated pH dosing regulators.

Highlight 3-Point Span Calibration: Emphasize how combining pH 4.01 with pH 6.86 and pH 9.18 standard powders ensures full linear response across acid, neutral, and base spectrums.

Recommended Cross-Sell Add-ons: Pair with Standard pH6.86 Powder, Standard pH9.18 Powder, Standard pH4.01 + pH6.86 + PH9.18 Calibration Powder, and 0-14pH Electrode Probe Sensor BNC Connector.

Featured Collection Star: Display prominently on your Water Quality Sensors collection page as an indispensable calibration standard.