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Name 1-Methylpiperazine
CAS 109-01-3
EINECS(EC#) 203-639-5
Molecular Formula C5H12N2
MDL Number MFCD00005966
Molecular Weight 100.16
MOL File 109-01-3.mol

Chemical Properties

Appearance clear liquid
Melting point  -6 °C
Boiling point  138 °C(lit.)
density  0.903 g/mL at 25 °C(lit.)
vapor density  3.5 (vs air)
vapor pressure  12 hPa (20 °C)
refractive index  n20/D 1.466(lit.)
Fp  108 °F
storage temp.  Store under Nitrogen
solubility  Chloroform (Soluble), Methanol (Soluble)
form  Liquid
pka pK1:4.94(+2);pK2:9.09(+1) (25°C,μ=0.1)
color  Clear
Specific Gravity 0.903
PH 11-12 (50g/l, H2O, 20℃)
explosive limit 1.2-9.9%(V)
Water Solubility  soluble
Sensitive  Hygroscopic
Detection Methods GC,NMR
BRN  102724
LogP -0.57 at 25℃
CAS DataBase Reference 109-01-3(CAS DataBase Reference)
NIST Chemistry Reference Piperazine, 1-methyl-(109-01-3)
Storage Precautions Moisture sensitive;Heat sensitive
EPA Substance Registry System 109-01-3(EPA Substance)

Safety Data

Hazard Codes  T,F,C,Xi
Risk Statements 
R21:Harmful in contact with skin.
R23:Toxic by inhalation.
R34:Causes burns.
R36/37/38:Irritating to eyes, respiratory system and skin .
Safety Statements 
S16:Keep away from sources of ignition-No smoking .
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 label where possible) .
S36:Wear suitable protective clothing .
RIDADR  UN 2734 8/PG 2
WGK Germany  2
RTECS  TM1225000
Autoignition Temperature 320 °C
Hazard Note  Flammable/Toxic/Corrosive/Store under nitrogen
HazardClass  3
PackingGroup  III
HS Code  29335995
Safety Profile
Poison by intraperitoneal route. Moderately toxic by inhalation, ingestion, and skin contact. A severe skin and eye irritant. Flammable liquid when exposed to heat or flame; can react with oxidizing materials. To fight fire, use alcohol foam, CO2, dry chemical. When heated to decomposition it emits toxic fumes of NOx.
LD50 orally in Rabbit: 2547 mg/kg LD50 dermal Rabbit 1341 mg/kg

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