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D3735-22 – Standard Test Method Technical Guide
📐 Scope and Classification
ASTM D3735-22, under Committee D01 jurisdiction, specifies four types of VM&P naphthas: Type I (Regular), Type II (High Flash), Type III (Odorless), and Type IV (Low Aromatics). These are moderately volatile, mainly aliphatic hydrocarbon solvents used primarily in the coatings industry.
| 🟦 Type | 📏 Description | ⚡ Key Feature |
|---|---|---|
| Type I | Regular | Standard volatility |
| Type II | High Flash | Elevated flash point |
| Type III | Odorless | Low odor profile |
| Type IV | Low Aromatics | Reduced aromatic content |
💡 Tip: For conformance, round test results to the nearest unit in the last right-hand digit of the specification limit per Practice E29.
⚙️ Referenced Test Methods
Key ASTM methods include D56 or D3278 for flash point, D86 for distillation, D156 or D5386 for color, D1133 for Kauri-Butanol value, D1159 for bromine number, D3257 for aromatics, and D4052 for density. Sampling follows Practice E300.
| 🟦 Property | 📏 Test Method | 🎯 Application |
|---|---|---|
| Flash Point | D56 / D3278 | Safety hazard assessment |
| Distillation Profile | D86 | Volatility range |
| Aromatic Content | D3257 / D1319 | Composition compliance |
| Density | D4052 | Mass and volume relationships |
⚠️ Hazard Alert: For specific hazard information and guidance, consult the supplier’s Material Safety Data Sheet (MSDS).
📊 Key Measured Properties
Values are stated in SI units as standard. Bromine number (D1159) indicates unsaturation, while Kauri-Butanol value (D1133) measures solvent power. The standard also includes odor (D1296) and copper strip corrosion (D130) for quality assurance.
The specification was originally approved in 1978 and last revised in 2022, reflecting international standardization principles.
❓ Frequently Asked Questions
🔍 What types of VM&P naphthas are covered?
The standard covers Type I (Regular), Type II (High Flash), Type III (Odorless), and Type IV (Low Aromatics).
💡 How is flash point determined?
Flash point is determined using Test Method D56 (Tag Closed Cup) or D3278 (Small Scale Closed-Cup Apparatus).
⚡ What is the Kauri-Butanol test used for?
The Kauri-Butanol value (D1133) measures the solvent power of hydrocarbon solvents, critical for coating formulations.
📌 How do I ensure conformance with D3735-22?
Follow all referenced test methods and round results to the nearest unit per Practice E29 for specification limits.