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D4710-07 – Standard Test Method Technical Guide
📊 Key Requirements and Properties
ASTM D4710-07 (Reapproved 2012) establishes the standard specification for acetaldehyde (99% grade). This standard is essential for manufacturers and users of acetaldehyde to ensure consistent quality for industrial applications. The specification is under the jurisdiction of ASTM Committee D01 on Paint and Related Coatings, Materials, and Applications.
Acetaldehyde supplied to this specification must meet the strict property limits defined in the standard. All SI units are the standard, and conformance requires rounding observed values to the nearest unit in the last right-hand digit per Practice E29.
| 🟦 Property | 📏 Specification Limit | 🎯 Test Method |
|---|---|---|
| Purity (as acetaldehyde), wt % | 99 min | D2192 |
| Color, Pt-Co units | 15 max | D1209 (or D5386) |
| Acidity (free acid as acetic acid), wt % | 0.05 max | D2086 |
| Nonvolatile matter, wt % | 0.5 max | D1353 (modified) |
📌 Note on Color Testing: While Test Method D1209 (visual) is the primary color test, Test Method D5386 (instrumental tristimulus colorimetry) may also be used. The standard notes that while no statistically significant difference was found between the methods in the interlaboratory study, it is not explicitly known if acetaldehyde was included in this study. It is best practice to confirm the agreed-upon method with the supplier.
⚙️ Standard Test Methods and Sampling
Conformance to the specification requires adherence to specific ASTM test methods, along with proper sampling techniques.
Sampling: The material must be sampled in accordance with Practice E300, which covers sampling of industrial chemicals.
Purity (D2192): Test Method D2192 is used for the determination of aldehydes and ketones purity.
Color (D1209 / D5386): The clarity and color of the liquid are determined. The visual method (D1209) is standard, but the instrumental method (D5386) is an acceptable alternative.
Acidity (D2086): This test method specifically measures the acidity in acetaldehyde and vinyl acetate