it says expiration date 5/2021 , are they still usable?

Probably, they are dry reagents. I would suggest ordering a new batch, comparing tests, and then decide.

So just to confirm hi774 is the same as hi736?

Hello hi774 is NOT the same as hi736. HI774-25 is designed to be used with samples that have an expected range of 0.00 to 0.90 ppm phosphate. HI736-25 is designed to be used with samples that have an expected range of 0 to 200 ppb phosphorus.

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Hanna Instruments HI774-25 Phosphate Ultra Low Range Checker HC Reagents (25 Tests) by wwG Store

Hanna Instruments HI774-25 Phosphate Ultra Low Range Checker HC Reagents (25 Tests) by wwG Store

Product ID: 138092753

Details

Brand
Hanna
Global Trade Identification Number
Manufacturer
Hanna Inc
Package Information
Bag
Unit Count
1 Count

⏳Clear expiration & lot traceability

🔬Ultra low range 0.00-0.90 ppm phosphate

🧪25 precision pre-measured tests

€ 52.95

Duties & taxes included

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Sold byAmazon SlovakiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🧪 Unlock ultra-precise phosphate insights before your competitors do!

PROVEN METHODOLOGY - Utilizes the trusted Ascorbic Acid Method for consistent, scientifically validated colorimetric analysis.
EFFORTLESS ACCURACY - Pre-measured reagents eliminate guesswork for fast, reliable phosphate readings.
SEAMLESS COMPATIBILITY - Specifically designed for Hanna Instruments HI774 Ultra Low Range Checker HC for instant results.
ULTRA LOW DETECTION RANGE - Detect phosphate levels as low as 0.00 ppm up to 0.90 ppm with lab-grade precision.
TRACEABILITY YOU CAN TRUST - Each packet is marked with expiration date and lot number for full quality control.

The Hanna Instruments HI774-25 reagent packets provide 25 pre-measured tests for ultra low range phosphate detection (0.00-0.90 ppm) using the Ascorbic Acid Method. Designed for use with the HI774 Checker HC, these high-purity reagents ensure fast, accurate, and traceable results with expiration and lot number markings for quality assurance.

Specifications

ASIN	B07SN7NSHP
Best Sellers Rank	#12,710 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #14 in Analytical Reagents
Brand Name	Hanna Instruments
Container Type	Bag
Customer Reviews	4.8 4.8 out of 5 stars (432)
Global Trade Identification Number	00860012631049
Manufacturer	Hanna Instruments, Inc
Model Number	HI774-25
Part Number	HI774-25
Unit Count	1 Count

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