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EC number: 243-072-0
CAS number: 19438-60-9
Hydrolysis: Half life - at ph 4: 1.43 minutes at 20 deg C; 2.04 minutes at 30 deg C and 0.692 minutes at 50 deg C.at ph 7: 1.90 minutes at 20 deg C; 1.26 minutes at 30 deg C and 0.327 minutes at 50 deg C.at ph 9: 1.27 minutes at 20 deg C; 1.18 minutes at 30 deg C and 0.233 minutes at 50 deg C.
Hydrolysis as a function of pH has been investigated in accordance
with OECD/EU test methods. 4-MHHPA was found to be highly unstable in
aqueous media at pH 4, 7 and 9 and temperatures of 20, 30 and 50 °C.
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