Melting point :-63 °C (lit.)
Boiling point :139 °C (lit.)
Density :0.91 g/mL at 20 °C (lit.)
vapor pressure :8.1 hPa (20 °C)
refractive index :n20/D 1.441(lit.)
Flash point :82 °F
storage temp. :Store below +30°C.
solubility :miscible
form :Powder
pka :7.67(at 25℃)
color :Cream to beige to brown-grey
PH :11.8 (100g/l, H2O, 20℃)
explosive limit :1.9%(V)
Water Solubility :miscible
FreezingPoint :-63℃
Sensitive :Air Sensitive
BRN :102969
Exposure limits :NIOSH REL: TWA 5 ppm (23 mg/m³), IDLH 100 ppm; OSHA PEL: TWA 20 ppm (94 mg/m³); ACGIH TLV: TWA 5 ppm (adopted).
Stability :Stable. Flammable. Incompatible with strong oxidizing agents. Slightly air sensitive.
LogP :0.08 at 24.6℃
CAS DataBase Reference :100-74-3(CAS DataBase Reference)
NIST Chemistry Reference :Morpholine, 4-ethyl-(100-74-3)
EPA Substance Registry System :N-Ethylmorpholine (100-74-3)

Symbol(GHS):
Signal word:	Danger
Hazard statements:	Code Hazard statements Hazard class Category Signal word Pictogram P-Codes H226 Flammable liquid and vapour Flammable liquids Category 3 Warning H302 Harmful if swallowed Acute toxicity,oral Category 4 Warning P264, P270, P301+P312, P330, P501 H311 Toxic in contact with skin Acute toxicity,dermal Category 3 Danger P280, P302+P352, P312, P322, P361,P363, P405, P501 H314 Causes severe skin burns and eye damage Skin corrosion/irritation Category 1A, B, C Danger P260,P264, P280, P301+P330+ P331,P303+P361+P353, P363, P304+P340,P310, P321, P305+ P351+P338, P405,P501
Precautionary statements:	P210 Keep away from heat/sparks/open flames/hot surfaces. — No smoking. P233 Keep container tightly closed. P280 Wear protective gloves/protective clothing/eye protection/face protection. P301+P312 IF SWALLOWED: call a POISON CENTER or doctor/physician IF you feel unwell. P303+P361+P353 IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower. P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.