2009-09-21_REVISION - M1981185

• Permit No: M1981185
• IBM Index Class Name: REVISION
• Doc Date: 9/21/2009
• Doc Name: Documents for TR-01
• From: Mike Clements
• To: DRMS
• Type & Sequence: TR1
• Email Name: WHE
• Media Type: D
• Archive: No

Attachment B, Technical Revision to the May Day Mine Permit, September 12, 2009. 15 of 35
4FMC
Technical Data
FMC Grade 260 Soda Ash CAS No. 497-19-8
Chemical Name Sodium Carbonate, anhydrous
CAS Name Disodium carbonate
Formula Na2CO3
Molecular Weight 105.99
Physical Properties
Typical Specification
Bulk Density: Ib/ft3 65 60 - 70
g/cm3 1.06 0.96-1.12
Particle density, g/cm3 1.960
Particle shape Blocky
Angle of repose, deg 40
Screen analysis, cumulative wt %
On US 30 (600 µm) 1.0
US 40 (425 µm) 15 27 max
US 100 (150 µm) 85
Thru US 200 (75 µm) 2 7 max
Chemical Properties
Typical Specification
Na2O, wt % 58.4 58.0 min
Na2CO3, wt % 99.8 99.2 min
Na2SO4, wt % 0.05 0.20 max
NaC1, wt % 0.06 0.20 max
Fe2O3, ppm 4 20 max
Water insolubles, wt % 0.01 0.05 max
Ignition loss, wt % 0.1
Heavy metals (as Pb), ppm <10 10 max
As, ppm 0.1 3 max
Ca, ppm 60
Mg, ppm 15
SiO2, PPM 100
General Properties
Description white granular solid
Melting point, °C (°F) 851 (1564)
Solubility, max % @ 35.4°C 33.2
pH, 11% solution @ 25°C 11.4
Standard Containers Bulk hopper cars and trucks
The information contained herein is, to our knowledge, true and accurate. Because oondidons of use are beyond our control, we make no
warranty or representation. expressed or implied, except that the products discussed herein conform to the chemical descriptions shown on
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FMC Corporation Aikail Chemicals Division 1735 Market Street Philadelphia Pennsylvania 19103
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