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Hach Phenol red indicator solution, 6.5-8.5 pH, 50mL
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Specifications:
| Application | Water Quality Analysis | ||
| Storage Temperature | Room Temperature | ||
| Product Type | Indicators | Forms | Liquid |
| Product Brand | Hach | ||
| Product Grade | Analytical grade | ||
Colorimetric pH Indicator for Neutral to Slightly Alkaline Water Testing (pH 6.5–8.5)
This Phenol Red Indicator Solution is a ready-to-use, colorimetric pH reagent ideal for monitoring the pH of neutral to slightly alkaline water samples in the range of 6.5 to 8.5 pH units. Packaged in a convenient marked dropper bottle, it enables quick, visual or instrument-assisted (e.g., DR300 or DR900 colorimeters) pH measurements.
Used in Method 10076, this indicator undergoes a distinct color change from yellow (acidic) to red (alkaline), providing an effective and reliable way to determine pH in a wide variety of water testing environments.
Key Features
- Colorimetric Range: pH 6.5 to 8.5
- Distinct Color Shift: Yellow to red transition for easy visual interpretation
- Application-Specific: Designed for use with DR300 or DR900 colorimeters
- Easy Handling: Supplied in a 100 mL dropper bottle for convenient dispensing
- Minimal Chlorine Interference: Tolerates up to 6 mg/L Cl₂; pre-treatment available for higher concentrations
Specifications
| Property | Value |
|---|---|
| Product Name | Phenol Red Indicator Solution |
| Part Number | 2657512 |
| Volume | 100 mL |
| Measuring Range | pH 6.5 – 8.5 |
| Method | Colorimetric (Phenol Red, Method 10076) |
| Platform | Liquid Solution |
| Container Type | Marked dropper bottle |
| Number of Tests | Approx. 50 mL worth per test |
| Compatible Instruments | DR300, DR900 Colorimeter |
| Interferences | Saltwater; >6 mg/L Cl₂ (can be treated with sodium thiosulfate) |
Applications
- Water Quality Monitoring – Municipal, potable, and source water
- Industrial Systems – Steam cycle, boiler, membrane protection
- Aquatic Environments – Aquaculture and recreational water testing
- Wastewater Treatment – Influent, effluent, and various treatment stages
- Quality Control & Research Labs – QA/QC testing and pre-treatment monitoring
Chlorine Removal Guidance
For chlorine levels >6 mg/L, treat the sample with 1 drop of 0.1 N sodium thiosulfate per 5 mL of sample (PN 2700832) to remove up to 50 mg/L Cl₂ before adding the indicator.
The Phenol Red Indicator Solution (pH 6.5–8.5) offers an accurate and visual method for determining pH in water samples across multiple industries. Its ease of use, compatibility with popular colorimeters, and reliable performance make it a trusted reagent for pH measurement in regulated and routine water monitoring workflows.