Methacrylic acid (MAA)
| Khoom npe | Methacrylic acid |
| CAS Nr. | 79-41-4 ib |
| Cov mis mos molecular | C4H6O2 |
| Molecular hnyav | 86.09 ib |
| Cov qauv qauv | |
| EINECS tus lej | 201-204-4 ib |
| MDL Nr. | PAB 00002651 |
Melting point 12-16 ° C (lit.)
Kub taw tes 163 ° C (lit.)
Qhov ceev 1.015 g / mL ntawm 25 ° C (lit.)
Vapor ceev> 3 (vs huab cua)
Vapor siab 1 mm Hg (20 ° C)
Refractive index n20/D 1.431 (lit.)
Flash point 170 ° F
Cia tej yam kev mob Cia ntawm +15 ° C rau +25 ° C.
Solubility Chloroform, Methanol (me ntsis)
Daim ntawv ua kua
Acidity factor (pKa) pK1:4.66 (25 ° C)
Xim Clear
Cov ntxhiab tsw yog Repulsive
PH 2.0-2.2 (100g / l, H2O, 20 ℃)
explosive txwv 1.6-8.7% (V)
Solubility dej 9.7g / 100 mL (20 ºC)
Moisture & Light Sensitive. Moisture & lub teeb rhiab heev
Merck 14,5941
PAB 1719937
Margin of exposure TLV-TWA 20 ppm (～70 mg/m3) (ACGIH).
Kev ruaj ntseg Tej zaum yuav ruaj khov los ntawm kev sib ntxiv ntawm MEHQ (Hydroquinone methyl ether, ca. 250 ppm) lossis hydroquinone. Thaum tsis muaj stabilizer, cov khoom no yuav nkag siab polymerize. Hluav taws kub. Incompatible nrog muaj zog oxidizing neeg sawv cev, hydrochloric acid.
InChIKeyCERQOIWHTDAKMF-UHFFFAOYSA-N
LogP0.93 ntawm 22 ℃
Risk Nqe: Danger
Risk Description H302+H332-H311-H314-H335
Kev ceev faj P261-P280-P301+P312-P303+P361+P353-P304+P340+P310-P305+P351+P338
Cov khoom txaus ntshai cim C
Hazard qeb code 21/22-35-37-20/21/22
Cov Lus Qhia Txog Kev Nyab Xeeb 26-36/37/39-45
Dangerous Goods Transport Code UN 2531 8/PG 2
WGK Germany 1
RTECS No. OZ2975000
Kev kub ntxhov combustion kub 752 ° F
TSCAYes
Kev lis kev cai Code 2916 13 00
Kev phom sij 8
Ntim Qeb II
Toxicity LD50 qhov ncauj hauv Luav: 1320 mg / kg
S26: Nyob rau hauv rooj plaub ntawm qhov muag, yaug tam sim ntawd nrog dej kom ntau thiab nrhiav kev kho mob.
S36/37/39: Hnav cov khaub ncaws tiv thaiv tsim nyog, hnab looj tes thiab tiv thaiv qhov muag / ntsej muag.
S45: Nyob rau hauv rooj plaub ntawm kev huam yuaj lossis yog tias koj tsis xis nyob, nrhiav kev kho mob tam sim ntawd (qhia rau lub lable qhov ua tau).
Khaws rau hauv qhov chaw txias. Khaws lub thawv airtight thiab khaws cia rau hauv qhov chaw qhuav, ventilated.
Ntim hauv 25Kg; 200Kg; 1000Kg nruas, lossis ntim raws li cov neeg siv khoom xav tau.
Methacrylic acid yog ib qho tseem ceeb organic chemical raw khoom thiab polymer intermediate.
