Industrial chemicals · Taylor, TXCertificate of Analysis
Sample Certificate of Analysis
Talc Powder ACS
ACS
Sample COA. Contact Alliance Chemical with your lot number to request a lot-specific COA.
- CAS number
- 14807-96-6
- Structure
Structure · PubChem - Grade
- ACS
- Answer summary
Sample specification reference for Talc Powder ACS. Source-record results are reference values, not measurements for your lot.
Last reviewed 2026-06-17 by Andre Taki, Chief Commercial Officer, DOT Hazmat–certified (49 CFR 172.704).
Specifications
| Parameter | Specification | Source reference result | Test Method |
|---|---|---|---|
| Content of magnesium | 17.0 % to 19.5 % | 19.0 % | Atomic absorption spectrophotometry, magnesium emission line 285.2 nm, air-acetylene flame |
| Absence of asbestos | Absence of asbestos; certificate of analysis states the absence of asbestos and the method used | Passes test | IR absorption (test A) or X-ray diffraction (test B); if either is positive, optical microscopy per USP <776> (test C) |
| Acid-soluble substances (as SO4) | 2.5 % max | 0.42 % | — |
| Acidity and alkalinity | Not more than 0.4 mL of 0.01 N hydrochloric acid; not more than 0.3 mL of 0.01 N sodium hydroxide | Passes test | Boil 2.5 g with 50 mL carbon dioxide-free water under reflux; titrate filtrate with bromothymol blue TS and with phenolphthalein TS |
| Free alkali (as NaOH) | 1 % max | 0.028 % | — |
| Arsenic | 3 mg/kg max | 0.40 mg/kg | — |
| Limit of calcium | 0.9 % max | 0.24 % | Atomic absorption spectrophotometry, calcium emission line 422.7 nm, nitrous oxide-acetylene flame |
| Heavy metals | 0.004 % max | 0.00078 % | — |
| Identification A (infrared absorption) | Maxima at 3677 +/- 2 cm-1, 1018 +/- 2 cm-1 and 669 +/- 2 cm-1 | Passes test | IR spectrum of a potassium bromide dispersion |
| Limit of iron | 0.25 % max | 0.064 % | Atomic absorption spectrophotometry, iron emission line 248.3 nm, air-acetylene flame |
| Limit of lead | 0.001 % max | 0.000052 % | Atomic absorption spectrophotometry, lead emission line 217.0 nm, air-acetylene flame |
| Limit of aluminum | 2.0 % max | 0.12 % | Atomic absorption spectrophotometry, aluminum emission line 309.3 nm, nitrous oxide-acetylene flame |
| Loss on drying | 0.5 % max | 0.08 % | — |
| Loss on ignition | 7.0 % max | 4.8 % | USP <733>; ignite about 1 g at 1075 +/- 25 C to constant weight |
| Soluble salts | 0.2 % max | 0.035 % | — |
| Water-soluble substances | 5 mg (0.1 %) max | 1.0 mg | Reflux 10.0 g with 50 mL carbon dioxide-free water 30 min; evaporate 25.0 mL of filtrate, dry at 105 C for 1 hour |
| Identification B (X-ray diffraction) | Diffraction pattern corresponds to that of the talc reference standard | Passes test | XRD, Cu K-alpha, compared to talc reference standard |
| Fineness (residue on 75-um / No. 200 sieve) | 99.0 % min passing | 99.8 % | Dry sieve analysis, 75-um woven-wire sieve |
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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