Hach 21680-42 DEHA Reagent 2 Solution

Overview

Hach 21680-42 is a genuine Hach DEHA Reagent 2 Solution, supplied in a 100 mL bottle, formulated as the companion reagent to DEHA Reagent 1 for the determination of oxygen scavengers in boiler feedwater and process water systems by the iron reduction method. Used together under Hach Method 8140, the Hach 21680-42 solution enables plant chemists to accurately quantify diethylhydroxylamine (DEHA), carbohydrazide, hydroquinone, iso-ascorbic acid and methylethylketoxime concentrations, providing the analytical confirmation needed to verify correct oxygen scavenger dosing across steam and boiler water treatment programs.

As the official authorized partner and exclusive regional representative for Hach, Seven Star LLC proudly supplies genuine Hach 21680-42 DEHA Reagent 2 Solution to industrial plants throughout Oman and the GCC. Every bottle shipped from our Muscat-based facility is sourced directly through Hach’s authorized distribution channel, ensuring authentic reagent chemistry, correct shelf-life dating and full compatibility with existing Hach spectrophotometers and DR900-series colorimeters already deployed across regional power generation and process water laboratories.

Operating Principle

The Hach 21680-42 DEHA Reagent 2 completes the two-part colorimetric reaction specified in Hach Method 8140, developing the color intensity initiated by DEHA Reagent 1 into a stable, measurable endpoint. When dosed into the reacted sample, the solution finalizes the iron reduction chemistry, producing a color development proportional to the concentration of oxygen scavenger compounds present, which the connected Hach spectrophotometer or colorimeter then converts into a quantitative reading across the method’s calibrated working range.

Because the reagent solution is factory formulated to a fixed concentration and dosing volume, results obtained using DEHA Reagent 2 alongside DEHA Reagent 1 provide plant chemists with consistent, repeatable analytical accuracy test after test. This reliability allows boiler water treatment programs to confidently verify oxygen scavenger residuals remain within the target dosing range needed to prevent dissolved oxygen corrosion in feedwater heaters, economizers, deaerators and boiler tubes, protecting high-value capital equipment from premature failure.

Engineering Design of the Hach 21680-42

The reagent is supplied as a ready-to-use liquid solution in a 100 mL amber or clear glass bottle designed for laboratory bench use, with a dropper or metered dispensing cap that delivers a consistent, repeatable dose volume for each test performed. This liquid format complements the powder pillow presentation of DEHA Reagent 1, together forming the complete two-reagent kit required to execute the Method 8140 procedure from start to finish.

The 100 mL bottle size is calibrated to support a substantial number of individual test doses before requiring replacement, matching typical laboratory consumption rates in power plant and process water testing programs. The solution is compatible with Hach DR-series spectrophotometers and portable colorimeters commonly deployed in boiler chemistry laboratories, integrating directly into existing Hach-based water quality testing workflows without requiring additional calibration equipment or method adaptation.

Key Features

The Hach 21680-42 DEHA Reagent 2 Solution delivers dependable performance around the following capabilities:

• Completes the two-part Hach Method 8140 colorimetric procedure for oxygen scavenger determination.
• Formulated to develop stable, measurable color intensity proportional to scavenger concentration.
• Supplied as a ready-to-use 100 mL liquid solution with metered dispensing for consistent dosing.
• Companion reagent to DEHA Reagent 1, together forming a complete testing kit for DEHA analysis.
• Compatible with Hach DR-series spectrophotometers and portable colorimeters for lab or field testing.
• Genuine Hach chemistry ensures repeatable, laboratory-grade analytical results across testing programs.
• Supports oxygen scavenger verification across carbohydrazide, hydroquinone and DEHA dosing regimes.
• Enables proactive boiler water treatment monitoring to prevent dissolved oxygen corrosion damage.

Industrial Applications

The Hach 21680-42 DEHA Reagent 2 is used extensively in power generation plant chemistry laboratories, industrial steam boiler operations, and process water treatment facilities where oxygen scavenger dosing must be verified to protect high-pressure boiler and feedwater systems from corrosion damage. In Oman’s power generation and desalination sector, as well as petrochemical steam systems across Muscat, Sohar and Salalah, plant chemists rely on DEHA Reagent 2 in combination with Reagent 1 to confirm oxygen scavenger residuals remain within specification across daily and shift-based monitoring routines.

As the officially authorized partner for Hach in Oman and the GCC, Seven Star LLC distributes genuine 21680-42 reagent bottles to power plant laboratories, water treatment operators and industrial testing contractors throughout the region, backed by regional warehouse stock and manufacturer-authenticated supply with confirmed shelf-life dating. Facilities across Sohar’s industrial port zone and Salalah’s free trade zone depend on Seven Star LLC for genuine Hach reagent chemistry with full batch traceability.

Technical Specifications

Call To Action

Seven Star LLC invites plant chemists and procurement teams across Oman and the GCC to submit a formal RFQ for the Hach 21680-42 DEHA Reagent 2 Solution. As the authorized partner for Hach in Oman and the GCC, we maintain regional warehouse stock for rapid dispatch, provide technical datasheets and method sheets on request, and offer direct access to our water analytics division for testing program support. Contact Seven Star LLC today to secure genuine Hach 21680-42 reagent with full manufacturer traceability and regional warranty backing.