Physical Address
304 North Cardinal St.
Dorchester Center, MA 02124
D2627-08 – Standard Test Method Technical Guide
📐 Specification Scope and Referenced Documents
ASTM D2627-08 (Reapproved 2012) establishes the standard specification for diacetone alcohol, also chemically identified as 4-hydroxy-4-methyl-pentanone-2. This standard is essential for ensuring quality and consistency in solvents used across paints, coatings, and chemical manufacturing applications.
The standard specifies requirements for conformance, including the use of Practice E29 for rounding off observed or calculated values “to the nearest unit” in the last right-hand digit of the specification limit. All values are stated in SI units. A comprehensive list of referenced ASTM standards, including test methods for distillation (D1078), flash point (D56), color (D1209, D5386), and water content (D1364), are integral to the enforcement of these specifications.
⚠️ Safety Reminder: Per Sections 1.4 and 1.5, this standard does not purport to address all safety concerns. Users must consult the supplier’s Material Safety Data Sheet (MSDS) and establish appropriate safety and health practices prior to use.
📊 Chemical and Physical Requirements
Diacetone alcohol must meet the following specific property limits to comply with ASTM D2627-08. These requirements ensure the solvent performs consistently in industrial applications.
| 🟦 Property | 📏 Specification Limit |
|---|---|
| Apparent Specific Gravity (20/20°C) | 0.938 – 0.941 |
| Apparent Specific Gravity (25/25°C) | 0.935 – 0.938 |
| Color, Pt-Co Units (max) | 25 |
| Distillation at 760 mm Hg | |
| Initial Boiling Point, °C (min) | 135 |
| Dry Point, °C (max) | 172 |
| Nonvolatile Matter, g/100 mL (max) | 0.01 |
| Odor | Nonresidual |
| Water, wt % (max) | 0.1 |
| Acidity (Free Acid as Acetic Acid), wt % (max) | 0.01 |
| Water Solubility | Miscible with distilled water in all proportions |
| Flash Point, °C (min) | 62.0 |
Note: The odor test is optional and should only be conducted when mutually agreed upon by the purchaser and supplier.
💡 Tip for Conformance: When determining compliance with this standard, the rounding-off method from Practice E29 must be applied. An observed or calculated value should be rounded to the nearest unit in the last right-hand digit used in expressing the specification limit.
⚙️ Test Methods and Compliance
Verification of the properties listed above requires specific ASTM test methods. Proper sampling is governed by Practice E300 to ensure representative results.
| 🎯 Property | ⚡ Applicable ASTM Method |
|---|---|
| Sampling | E300 |
| Flash Point | D56 (Tag Closed Cup Tester) |
| Distillation Range | D1078 |
| Color | D1209 or D5386 |
| Nonvolatile Matter | D1353 |
| Water Content | D1364 (Karl Fischer Titration Method) |
| Acidity | D1613 |
| Odor | D1296 |
| Specific Gravity | D4052 (Digital Density Meter) |
| Water Miscibility | D1722 |
❓ Frequently Asked Questions
🔍 What is the scope of ASTM D2627-08?
This specification covers the quality requirements for diacetone alcohol (4-hydroxy-4-methyl-pentanone-2), a solvent commonly used in paints, varnishes, and lacquers. The standard defines limits for purity, water content, distillation range, and other key physical properties.
💡 What are the critical limits for the distillation of diacetone alcohol?
At 760 mm Hg, the initial boiling point must be a minimum of 135 °C, and the dry point must be a maximum of 172 °C. These limits ensure the solvent has the correct volatility characteristics for its intended use.
⚡ How is the flash point requirement for this specification measured?
The minimum flash point of 62.0 °C is determined by Test Method D56 (Tag Closed Cup Tester). This is a critical safety parameter for the handling, transport, and storage of the material.
📌 Are there specific packaging requirements in this standard?
Yes. Clause 2.2 references U.S. Federal Specification PPP-C-2020, which governs the packaging of liquid, dry, and paste chemicals. This ensures diacetone alcohol is supplied in safe, compliant containers.