Home Categories Organic Chemistry Morpholine
A5411712

Morpholine , AR,99% , 110-91-8

Synonym(s):
Morpholine;Tetrahydro-1,4-oxazine

CAS NO.:110-91-8

Empirical Formula: C4H9NO

Molecular Weight: 87.12

MDL number: MFCD00005972

EINECS: 203-815-1

Update time: 2022-07-08

PRODUCT Properties

Melting point: -7--5 °C (lit.)
Boiling point: 126.0-130.0 °C 129 °C (lit.)
Density  0.996 g/mL at 25 °C (lit.)
vapor density  3 (vs air)
vapor pressure  31 mm Hg ( 38 °C)
refractive index  n20/D 1.454(lit.)
Flash point: 96 °F
storage temp.  Store below +30°C.
solubility  water: miscible
pka 8.33(at 25℃)
form  Liquid
Specific Gravity 0.996
color  APHA: ≤15
PH 11.2 (H2O)(undiluted)
Odor Characteristic amine-like odor
explosive limit 1.4-15.2%(V)
Water Solubility  MISCIBLE
FreezingPoint  -4.9℃
Sensitive  Hygroscopic
Merck  14,6277
BRN  102549
Exposure limits TLV-TWA 20 ppm (~70 mg/m3) (ACGIH, MSHA, and OSHA); STEL skin 30 ppm (ACGIH); IDLH 8000 ppm.
Dielectric constant 7.3(25℃)
Stability: Stable. Flammable. Incompatible with strong oxidizing agents, strong acids, acid chlorides, acid anhydrides. Hygroscopic.
InChIKey YNAVUWVOSKDBBP-UHFFFAOYSA-N
LogP -0.860

Description and Uses

Morpholine is a colorless liquid with a weakammonia or fish-like odor. The odor threshold is 0.01 ppm.Molecular weight = 87.14; Specific gravity (H2O:1) 51.007; Boiling point = 128.9℃; Freezing/Meltingpoint 5 25℃; Vapor pressure 5 6 mmHg at 20℃; Flashpoint 5 37℃. Autoignition temperature 5 310℃. Explosivelimits: LEL 5 1.4%; UEL 5 11.2%. Hazard Identification(based on NFPA-704 M Rating System): Health 3,Flammability 3, Reactivity 0. Soluble in water

Rubber accelerator, solvent, additive to boilerwater, waxes and polishes, optical brightener fordetergents, corrosion inhibitor, preservation of bookpaper, organic intermediate (catalyst, antioxidants,pharmaceuticals, bactericides, etc.).

Safety

Symbol(GHS) 
GHS02,GHS05,GHS06
Signal word  Danger
Hazard statements  H226-H302+H332-H311-H314
Precautionary statements  P210-P280-P301+P312-P303+P361+P353-P304+P340+P310-P305+P351+P338
Hazard Codes  C
Risk Statements  10-20/21/22-34
Safety Statements  23-36-45
RIDADR  UN 2054 8/PG 1
OEB A
OEL TWA: 20 ppm (70 mg/m3), STEL: 30 ppm (105 mg/m3) [skin]
WGK Germany  3
RTECS  QD6475000
Autoignition Temperature 590 °F
TSCA  Yes
HS Code  2934 99 90
HazardClass  8
PackingGroup  I
Toxicity LD50 orally in female rats: 1.05 g/kg (Smyth)
IDLA 1,400 ppm [10% LEL]

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