Methacrylic acid(MAA)
| Product Name | Methacrylic acid |
| CAS No. | 79-41-4 |
| Molecular formula | C4H6O2 |
| Molecular weight | 86.09 |
| Structural Formula | |
| EINECS number | 201-204-4 |
| MDL No. | MFCD00002651 |
Melting point 12-16 °C (lit.)
Boiling point 163 °C (lit.)
Density 1.015 g/mL at 25 °C (lit.)
Vapor density >3 (vs air)
Vapor pressure 1 mm Hg (20 °C)
Refractive index n20/D 1.431(lit.)
Flash point 170 °F
Storage conditions Store at +15°C to +25°C.
Solubility Chloroform, Methanol (Slightly)
Liquid form
Acidity factor (pKa)pK1:4.66 (25°C)
Color Clear
The Odor is Repulsive
PH 2.0-2.2 (100g/l, H2O, 20℃)
explosive limit 1.6-8.7%(V)
Water solubility 9.7g /100 mL (20 ºC)
Moisture & Light Sensitive. Moisture & light sensitive
Merck14,5941
BRN1719937
Margin of exposure TLV-TWA 20 ppm (～70 mg/m3) (ACGIH).
Stability May be stabilized by the addition of MEHQ (Hydroquinone methyl ether, ca. 250 ppm) or hydroquinone. In the absence of a stabilizer this material will readily polymerize. Combustible. Incompatible with strong oxidizing agents, hydrochloric acid.
InChIKeyCERQOIWHTDAKMF-UHFFFAOYSA-N
LogP0.93 at 22℃
Risk Phrases：Danger
Risk Description H302+H332-H311-H314-H335
Precautions P261-P280-P301+P312-P303+P361+P353-P304+P340+P310-P305+P351+P338
Dangerous goods mark C
Hazard category code 21/22-35-37-20/21/22
Safety Instructions 26-36/37/39-45
Dangerous Goods Transport Code UN 2531 8/PG 2
WGK Germany1
RTECS number OZ2975000
Spontaneous combustion temperature 752 °F
TSCAYes
Customs Code 2916 13 00
Danger level 8
Packaging Category II
Toxicity LD50 orally in Rabbit: 1320 mg/kg
S26：In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.
S36/37/39：Wear suitable protective clothing, gloves and eye/face protection.
S45：In case of accident or if you feel unwell, seek medical advice immediately (show the lable where possible).
Store in a cool place. Keep the container airtight and store in a dry, ventilated place.
Packed in 25Kg;200Kg;1000Kg drum,or packed according to customer needs.
Methacrylic acid is an important organic chemical raw material and polymer intermediate.
