Metal Pickling & Finishing pH Testing Strips

SKU: 33812-0025

$9.59USD or lower Each

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Verify extremely low pH in metal pickling and finishing baths using Indigo® pH 0–2.5 test strips. Fast screening for process control.

Metal finishing and pickling processes rely on highly acidic solutions to remove oxides, scale, and surface contaminants from steel and other metals. Indigo® Acid pH 0–2.5 test strips provide a fast, practical way to verify bath acidity during pickling, etching, and surface preparation steps. Immediate visual results support consistent process control while helping operators detect dilution, exhaustion, or unintended neutralization of acid baths.

We've been selling pH test strips since 2005. All Indigo® pH test strips have Certificate of Analysis, Stability & SDS documents as listed below. They come 50 strips/pack with a guaranteed 3 year shelf life (dated back from expiration date "yyyy.mm.dd").

Details Specs Docs Reviews

Details

Indigo® pH 0–2.5 test strips are intended for rapid screening and verification, helping document extreme acidity during active processing and before downstream treatment or disposal.

Indigo®: pH 0-2.5 Test Strip Features

Narrow range optimized for strong acids (pH 0–2.5)
Fast colorimetric results in seconds
No calibration, reagents, or electronics
Disposable and field-friendly
Ideal for screening, training, and routine checks

Warning: These acids are highly corrosive when concentrated. Wear safety goggles & shield, lab coat & apron, proper gloves & test in a fume hood if possible. Add acid to water not the other way around.

Related information or images

Specifications

Color chart pH intervals: 0, 0.5, 1.0, 1.5, 2.0, 2.5

Intervals of 0.5 pH unit but can resolve 0.25 with practice
Dip strip, shake off excess liquid, compare to color chart immediately
Minimum shelf life is 3 years if kept sealed but >5 years is typical:
Store at room temperature away from sunlight.
The number of strips (50) per pack is approximate.

Documentation

A Certificate of Conformance is available on request after shipment.
Indigo® pH test strips are made in USA & calibrated with NIST standards.

Test Strip Documentation
Stability Statement	Certificate of Analysis	SDS

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Metal Pickling & Finishing pH Testing Strips