MATERIAL
SAFETY
DATA
SHEET
September
12,
2007
DIMETHYL
SULFOXIDE
(DMSO)
MSDS
GCC1-9
3
Usage/Handling
Precautions:
Keep
away from sources of ignition. No Smoking. Do not breathe vapor or mist. Avoid
contact
with skin, eyes, or clothing.
Storage
Precautions:
Keep
container tightly closed, in a well-ventilated place. Freezes (solidifies)
at 18
o
C (64
o
F)
Exposure
Limits:
ACGIH
Threshold Limit Value (TLV): not established
OSHA (USA) Permissible Exposure Limit (PEL, 1989 Table Z-1-A values or section-specific
standards): not established
AIHA Workplace Environmental Exposure Level "WEEL" guideline for airborne
concentrations
in the workplace: 250 ppm (8-hr TWA)
Ventilation:
Good
general ventilation (typically 10 air changes per hour) should be used. Ventilation
rates
should be matched to conditions. Use process enclosures, local exhaust ventilation,
or other
engineering controls to maintain ventilation.
Respiratory
Protection:
In case
of mist formation use a respirator. Respirator type: organic vapor cartridge,
SCBA or
SAR. If respirators are used, a program should be instituted to assure compliance
with OSHA
standard 29 CFR § 1910.134.
Hand
Protection/Protective clothing:
Butyl
rubber or nitrile (NBR) rubber gloves. Rubber apron and boots if splash hazard.
Eye
Protection:
Safety
glasses with side shield, tight-fitting goggles or face shield.
Appearance:
colorless
liquid
Odor:
essentially
odorless
Odor
Threshold:
not
available
pH:
8.5
(50/50 in water)
Boiling
Point:
189
o
C (372
o
F)
Flashpoint
and method:
89
o
C (192
o
F) closed
cup
95
o
C (203
o
F) open
cup
Flammable
Limits (% in air):
LEL:
3.0 - 3.5% by volume
UEL: 42-63% by volume
Autoignition
Temperature:
300-302
o
C (572-575
o
F)
Vapor
Pressure:
0.55
mbar (0.46 mmHg) @ 20
o
C (68
o
F)
Specific
Gravity:
1.1
at 20
o
C (68oF)
(water = 1)
Solubility
in water at 20
C:
miscible
Octanol/Water
Partition Coefficient:
logP
ow
= -2.03
Viscosity
at 25
C
(77
F):
2.0
mPa.s or cP
Vapor
Density (Air = 1):
2.7
Evaporation
rate (n-butyl acetate = 1):
0.026
Melting
Point:
18
o
C (64
o
F)
Sensitivity
to Static Discharge:
Material
is unlikely to accumulate a static
charge, which could act as an ignition source.
7.
HANDLING AND STORAGE
8.
EXPOSURE CONTROLS/PERSONAL PROTECTION
9.
PHYSICAL AND CHEMICAL PROPERTIES