Fluid Viscosities

The values identified below are for dynamic viscosity as measured using centiPoise (cP) and SI units N.s m ^-2. = Pa. s
1 Centipoise = 1 mPa s (milliPascal Second)= 10 ^-3 Pa.s
1 Pa.s = 1000 centiPoise

Table of dynamic gas viscosity values in cP at room temperatures (20 deg C) and atmospheric pressure

Fluid	Dynamic viscosity
	cP(Centipoise)
Acetylene	0,00935
Ammonia	0,00918
Argon	0,021
Carbon Dioxide	0,014
Carbon Monoxide	0,0166
Chlorine	0,0129
Cyanogen	0,00928
Ethylene	0,0097
Helium	0,0186
Hydrogen	0,00835
Hydrogen Chloride	0,0138
Hydrogen Sulphide	0,0117
Methane	0,0103
Nitric Oxide	0,0178
Nitrous Oxide	0,0135
Oxygen	0,0192
Sulphur Dioxide	0,0117

Dynamic viscosities (Pa.s) of various gases at different temperatures at atmospheric pressure

Example value Air (0 deg C) dynamic viscosity = 17 X 10 ^-6 Pa.s = 0,017 cPoise

Gas	Symbol	Temperature (Deg. C)
		0	100	250	500
		Viscosity Pa s ( Actual x 106 )
Oxygen	O2	19	24	30	39
Helium	He	18	22	28	37
Air	-	17	21	27	35
Nitrogen	N2	16,5	21	265	35
Carbon Monoxide	CO	16,5	21	26	35
Carbon Dioxide	CO2	13,7	18	24	34
Sulphur Dioxide	SO2	11.8	15	20	28
Ammonia	NH3	9,5	13	18	27
Hydrogen	H2	85	10,5	12,5	16,5
Ethane	C2H6	8,5	11,5	15,5	22,5
Propane	C3H8	7,7	10	13,2	18
Butane	C4H20	8	10,5	14,2	20

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Dynamic Viscosities of Various liquids at room Temperature (20 degres C)

Fluid	Dynamic viscosity
	cP(Centipoise)
Acetic Acid	1,219
Acetone	0,324
Benzene	0,647
Bromine	0.993
Carbon Disulphide	0,375
Carbon Tetrachloride	0.972
Chloroform	0,569
Glycerol	1495
Mercury Hg	1,552
Methyl Alcohol	0,594
Nitrobenzene	2,03
Olive Oil	84000
Lubricating Oil	799,4
Paraffin Oil	1000
Phenol	12,74
Toluene	0,585
Turpentine	1,49
Water	1

Dynamic Viscosities (Pa.s) of Various Liquids at different temperatures

Example value Water (20 deg C) dynamic viscosity = 0,001 Pa.s = 1 cPoise

Liquid..........	Chemical symbol	Temperature (Deg. C)
		-25	0	20	50	100	200
		Viscosity centiPoise (cP) (val's x 10-3 = Pa.s )
Water	H20	-	1,7918	1,0028	0,5471	0,2817	0,1346
Light Machinery Oil	-	-	-	-	28	4,9	-
Spindle Oil	-	-	-	13	5,49	2,0	-
Ethanol	C2H5OH	3,241	1,786	1,201	0,701	0,326	-
Methanol	CH3OH	-	0,817	0,584	0,396	-	-
Benzene	C6H6	-	-	0,649	0,436	0,261	0,113
Toluene	C7H8	-	0,773	0,586	0,419	0,269	0,133
Sulphur Dioxide	SO2	-	0,368	0,304	0,234	-	-
Ammonia	NH3	0,215	0,169	0,138	0,103	-	-
Freon 113	-	1,4	0.92	0,75	0,5	0,29	-
Fuel Oil (sg=0.94)	-	-	-	1000	100	11	2,5
Crude Oil (sg = 0,855)	-	-	16	7,5	4	2,5	1,5
Kerosene	-	-	3,7	2,5	1,4	0,6	-
Sulphuric Acid (100%)		90	36	25	10,5	3,4	-
Sulphuric Acid (60%)		16	9	6	3,5	1,5	-
Nitric Acid (95%)		2,1	1,5	1,2	0,85	0,50	-
Nitric Acid (60%)		6,0	3,5	2,5	1,4	0,7	-
Mercury		2	1,60	1,55	1,5	1,45	1,1