Electronic Grade Specialty Gas

Electronic Grade Methyl Chloride / Chloromethane

Methyl chloride, also known as chloromethane (CH₃Cl), is a colorless, flammable gas with a faint, sweet odor. While it has various industrial applications, including the production of silicones, methyl cellulose, and as a methylating agent, its "electronic grade" designation signifies a significantly higher level of purity.

In the electronics industry, even trace amounts of impurities can severely impact the performance, reliability, and yield of sensitive electronic components. Electronic grade methyl chloride is specifically manufactured and purified to meet stringent quality standards, ensuring minimal levels of contaminants such as water, other chlorinated hydrocarbons, metals, and non-volatile residues. This exceptionally high purity is crucial for its use in critical processes like semiconductor manufacturing, etching, cleaning, and as a precursor for depositing thin films, where precise control over chemical reactions and material properties is paramount.

The demand for electronic grade methyl chloride is growing due to the continuous expansion and technological advancements in the electronics and automotive sectors, which rely on the production of various chemical intermediates and end products derived from this high-purity compound.

• Purity (Assay): ≥99.99% to ≥99.999% (or even higher, e.g., 5N for 99.999%, 6N for 99.9999%)
• Water Content: ≤5 ppmw (parts per million by weight) to ≤1 ppmw or lower (sometimes in ppb)
• Non-Volatile Residue (NVR): ≤5 ppmw to ≤1 ppmw (often specified in ppb, e.g., ≤100 ppb)
• Metallic Impurities (Individual Metals, e.g., Fe, Cu, Na, K, Al, Ni, Cr, Zn): ≤10 ppb (parts per billion) for each metal. Often specified as ≤1 ppb or even ≤0.1 ppb for critical applications. Total metallic impurities: ≤50 ppb to ≤10 ppb.
• Other Chlorinated Hydrocarbons (e.g., Dichloromethane, Chloroform): ≤10 ppmw to ≤1 ppmw (or lower, depending on specific contaminant)
• Acidity (as HCl): ≤1 ppmw to ≤0.1 ppmw
• Particle Count: Typically specified for liquid products (if applicable) at a certain particle size range (e.g., ≤10 particles/mL at ≥0.2μm)
• Boiling Point: −24.2 °C to −23.7 °C (consistent with pure methyl chloride)
• Appearance: Clear and colorless
• Free Halogens (e.g., Free Chlorine): Absent (below detection limits)

Electronic Grade Dichloromethane

Dichloromethane (CH₂Cl₂), commonly known as methylene chloride, is a volatile, colorless liquid with a moderately sweet aroma. While it finds widespread use as a solvent in various industries, including paint stripping, degreasing, and pharmaceutical manufacturing, its "electronic grade" designation signifies a profoundly higher level of purity tailored for sensitive electronic applications.

In the highly demanding world of electronics manufacturing, the presence of even minute impurities can lead to catastrophic failures, compromised device performance, and reduced production yields. Electronic grade dichloromethane undergoes rigorous purification processes to achieve exceptionally low levels of contaminants such as water, other chlorinated hydrocarbons, metals, and non-volatile residues. This ultra-high purity is critical for its application in precision cleaning of electronic components, photoresist stripping in semiconductor fabrication, as a solvent for specific coating applications, and in other processes where residue-free performance and chemical inertness are paramount. The reliability and functionality of advanced electronic devices, from microprocessors to display panels, heavily depend on the purity of the chemicals used in their manufacturing, making electronic grade dichloromethane an indispensable material in this sector.

• Purity (Assay): ≥99.9% to ≥99.99% (often specified as 4N for 99.99% or higher)
• Water Content: ≤50 ppmw (parts per million by weight) to ≤10 ppmw or even lower (≤5 ppmw)
• Non-Volatile Residue (NVR): ≤10 ppmw to ≤5 ppmw (often specified in ppb, e.g., ≤500 ppb to ≤100 ppb)
• Metallic Impurities (Individual Metals, e.g., Fe, Cu, Na, K, Al, Ni, Cr, Zn): ≤100 ppb to ≤10 ppb for each metal. Often specified as ≤1 ppb or even ≤0.1 ppb for critical applications. Total metallic impurities: ≤50 ppb to ≤10 ppb.
• Other Chlorinated Hydrocarbons (e.g., Chloroform, Carbon Tetrachloride): ≤100 ppmw to ≤10 ppmw (with specific limits for individual impurities)
• Acidity (as HCl): ≤1 ppmw to ≤0.5 ppmw
• Particle Count: Typically specified for liquid products (if applicable) at a certain particle size range (e.g., ≤10 particles/mL at ≥0.2μm)
• Boiling Point: 39.6 °C to 40.0 °C (consistent with pure dichloromethane)
• Appearance: Clear and colorless
• Free Halogens (e.g., Free Chlorine): Absent (below detection limits)

Electronic Grade Trichloromethane

Trichloromethane, more commonly known as chloroform (CHCl₃), is a dense, colorless liquid with a characteristic sweet, pervasive odor. While historically recognized for its anesthetic properties and current use in the production of refrigerants and as a solvent in various chemical processes, its "electronic grade" designation marks a crucial distinction. This highly purified form is specifically engineered to meet the rigorous demands of the electronics industry.

In the fabrication of sophisticated electronic components, even minute levels of impurities can lead to significant defects, compromised performance, and reduced yields. Electronic grade trichloromethane undergoes extensive purification to achieve exceptionally low concentrations of contaminants such as water, other chlorinated hydrocarbons, metallic ions, and non-volatile residues. This ultra-high purity is essential for its application in specialized cleaning processes for sensitive electronic parts, as a solvent in certain thin-film deposition techniques, and in other critical steps where residue-free operation and precise chemical properties are paramount. The reliability and longevity of modern electronic devices, from advanced semiconductors to optical components, are directly dependent on the purity of the chemicals employed in their manufacturing, making electronic grade trichloromethane a vital material in this high-tech sector.

• Purity (Assay): ≥99.9% to ≥99.99% (often specified as 4N for 99.99% or higher)
• Water Content: ≤50 ppmw (parts per million by weight) to ≤10 ppmw or even lower (≤5 ppmw)
• Non-Volatile Residue (NVR): ≤10 ppmw to ≤1 ppmw (often specified in ppb, e.g., ≤500 ppb to ≤100 ppb)
• Metallic Impurities (Individual Metals, e.g., Fe, Cu, Na, K, Al, Ni, Cr, Zn): ≤100 ppb to ≤10 ppb for each metal. Often specified as ≤1 ppb or even ≤0.1 ppb for critical applications. Total metallic impurities: ≤500 ppb to ≤50 ppb.
• Other Chlorinated Hydrocarbons (e.g., Carbon Tetrachloride, Dichloromethane): ≤100 ppmw to ≤10 ppmw (with specific limits for individual impurities)
• Acidity (as HCl): ≤1 ppmw to ≤0.5 ppmw
• Particle Count: Typically specified for liquid products (if applicable) at a certain particle size range (e.g., ≤10 particles/mL at ≥0.2μm)
• Boiling Point: 61.1 °C to 61.3 °C (consistent with pure trichloromethane)
• Appearance: Clear and colorless
• Free Halogens (e.g., Free Chlorine): Absent (below detection limits)