Methacrolein
Methacrolein (CAS: 78-85-3), with the chemical formula H2C=C(CH3)CHO and a molecular weight of 70.09 g/mol, is a volatile aldehyde. It serves as a crucial building block in organic synthesis and is utilised in research to investigate the impact of oxidation products, such as methacrolein itself, on biological systems like human eye blink frequency. It is also employed in kinetic studies concerning atmospheric chemistry reactions.
- IUPAC
- Methacrylaldehyde

Research Chemical
Methacrolein is used in scientific studies to investigate the effects of airborne compounds on human physiology, such as eye blink frequency, and to determine reaction rate constants in atmospheric chemistry research.
Organic Synthesis
As a reactive aldehyde and an organic building block, methacrolein is employed in the synthesis of more complex organic molecules and chemical intermediates.
Kinetic Studies
It is utilised in laboratory settings to measure and understand the reaction rates and products formed when interacting with various chemical agents, including atomic chlorine.
| Molecular weight | 70.09 |
|---|---|
| Linear formula | H2C=C(CH3)CHO |
| Assay | 95% |
| Boiling point | 68-70 °C(lit.) |
| Density | 0.85 g/mL at 25 °C(lit.) |
| Refractive index | n20/D 1.416(lit.) |
| Vapour pressure | 121 mmHg (20 °C)13.44 psi (55 °C)5.35 psi (20 °C) |
| Melting point | −81 °C(lit.) |
| Vapour density | 2.4 (vs air) |
| Storage temperature | 2-8°C |
| Application | Methacrolein was used to study the effect of parts per billion levels of limonene oxidation products and the terpene oxidation product, methacrolein on human eye blink frequency1. It was also used in determination of rate constants and the products of the reactions between atomic chlorine and acrolein, methacrolein and methyl vinyl ketone2. |



Hazard statements
- H225Highly flammable liquid and vapour
- H301Toxic if swallowed
- H314Causes severe skin burns and eye damage
Precautionary statements
- P210Keep away from heat, sparks and open flames. No smoking
- P280Wear protective gloves, clothing and eye/face protection
- P301IF SWALLOWED
- P305IF IN EYES
- P310Immediately call a POISON CENTER or doctor
| Protective equipment | Faceshields, full-face respirator (US), Gloves, Goggles, multi-purpose combination respirator cartridge (US), type ABEK (EN14387) respirator filter |
|---|---|
| Transport (UN / ADR) | UN 2396 3/PG 2 |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | F,T |
| Risk statements (R) | 11-24/25-3413.44 psi (55 °C) |
| Safety statements (S) | 16-26-36/37/39-455.35 psi (20 °C) |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is Methacrolein (CAS 78-85-3) used for?
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Methacrolein is used in research to study the effects of oxidation products on human physiology and in kinetic studies concerning atmospheric chemistry. It also serves as a building block in organic synthesis.
What is the CAS number and chemical formula for Methacrolein?
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The CAS number for Methacrolein is 78-85-3, and its chemical formula is H2C=C(CH3)CHO.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Methacrolein with an assay of 95%. We do not represent this product as USP, BP, EP, or any other pharmacopoeia grade.
How should Methacrolein be handled safely?
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Methacrolein is highly flammable and toxic. Handle with extreme caution in a well-ventilated area, wearing appropriate personal protective equipment including gloves, goggles, a face shield, and a suitable respirator. Store at 2-8°C.
How is Methacrolein packed and shipped?
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Methacrolein is packed and shipped in compliance with all relevant regulations for hazardous materials. As a global supplier, TSS exports chemicals worldwide.
How can I request a quote or sample for Methacrolein?
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Please contact our sales department via the website or by phone to request a quote or a sample of Methacrolein.
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