Industrial chemicals · Taylor, TXCertificate of Analysis
Sample Certificate of Analysis
Sodium Hydroxide 25% ACS Grade
ACS Grade · 25%
Sample COA. Contact Alliance Chemical with your lot number to request a lot-specific COA.
- CAS number
- 1310-73-2
- Structure
Structure · PubChem - Grade
- ACS Grade · 25%
- Assay specification
- 24.5 - 25.5 %
- Answer summary
Sample specification reference for Sodium Hydroxide 25% ACS Grade. Source-record results are reference values, not measurements for your lot.
Last reviewed 2026-07-06 by Andre Taki, Chief Commercial Officer, DOT Hazmat–certified (49 CFR 172.704).
Specifications
| Parameter | Specification | Source reference result | Test Method |
|---|---|---|---|
| Assay (NaOH) | 24.5 - 25.5 % | 24.90 % | — |
| Concentration, NaOH, ACS | 24.75 - 25.25% w/v | 24.90 % | — |
| Ammonium hydroxide precipitate | 0.005% max | 0.00053 % | — |
| Calcium (Ca) | 0.0013% max | 0.000020 % | — |
| Chloride (Cl) | 0.001% max | 0.00036 % | — |
| Heavy metals (as Ag) | 0.0005% max | 0.000019 % | — |
| Iron (Fe) | 2.5 ppm max | 0.22 ppm | — |
| Magnesium (Mg) | 0.00051% max | 0.0000083 % | — |
| Mercury (Hg) | 0.025 ppm max | 0.00040 ppm | — |
| Nickel (Ni) | 2.5 ppm max | 0.14 ppm | — |
| Nitrogen compounds (as N) | 2.5 ppm max | 0.12 ppm | — |
| Phosphate (PO4) | 3 ppm max | 0.048 ppm | — |
| Potassium (K) | 0.005% max | 0.0012 % | — |
| Sodium carbonate | 0.12 % max | 0.062 % | — |
| Sulfate (SO4) | 0.00055% max | 0.00019 % | — |
| Color (APHA) | Max 20 | 1 | — |
| Specific gravity (20 °C) | 1.269 - 1.279 | 1.273 | — |
| Composition | 25 % sodium hydroxide in deionized water, by weight | Conforms | By formulation; confirmed by specific gravity |
Specification limits and source-record results are reproduced from the current product reference used by the TDS. This sample is not an issued certificate and does not identify a tested lot. Contact Alliance Chemical with the product and lot number for lot-specific documentation.
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