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HOW TO DETERMINE YOUR DESICCITE 25
NEEDS

The number of Desiccite 25 units required for your application depends on the type and size of container you use, and the amount and type of product and dunnage in that container.

One unit of Desiccite 25 which is approximately one ounce, will adsorb at least 3 grams of water vapor at 20% relative humidity and at least 6 grams of water vapor at 40% relative humidity, at 77 degrees F (25 degrees C).

USAGE FORMULA

To determine the units of Engelhard Desiccite 25 activated mineral desiccant necessary to protect a package, the following formulas can be used as a guideline.

For Flexible Barriers:

Area Formula

Square Feet x factor of 1.6

or
Square Inches x factor of 0.011

or
Square Meters x factor of 17

Example

A barrier package whose sides measure 12" x 14"
12" x 14" x 2 sides x 0.011 = 336 Sq. In. x 0.011 = 3.70

Closest size would be a 4 unit bag

For Ridge Metals Containers:

Volume Formula


Volume in gallons x factor of 1.161

or
Volume in cubic feet x factor of 1.2

or
Volume in cubic inches x factor of 0.0007

Example

A 5-gallon can

5-gallons x 0.161 = .81

Closest size would be a 1 unit bag.

Round off the number of units required to the next largest unit rather than the next lowest.

Chart

Moisture Sealed Flexible Barriers

 

Sealed Barrier Coated Fiber Drums* or Rigid
Metal Containers

Area in
Square Feet

Area in
Square Inches

Units Desiccite 25
Required

Volume in
Gallons

Volume in
Cubic Feet

Volume in
Cubic Inches

0.1
0.2
0.3
0.6
1.3
2.5
5.0
10.0
50.0

14
29
43
86
187
360
720
1440
7200

1/6
1/3
1/2
1
2
4
8
16
80

1.0
2.1
3.2
6.2
12.5
25
49.9
99.8
499.0

0.14
0.28
0.42
0.83
1.67
3.33
6.66
13.32
66.65

242
484
726
1,434
2,886
5,754
11,508
23,017
115,171

*With Gasketed Covers.

COMPENSATION FOR DUNNAGE

Additional Desiccite 25 is required to compensate for dunnage (interior packing, cushioning, blocking, and bracing material).

Dunnage Formula

Dunnage weight in pounds x Dunnage type factor

Dunnage Type Factors

8 for hair, felt, wood, celluloseand other materials not described below
6 for bound fibers
2 for glass fibers
0.5 for sythetic foam or rubber

Example

Dunnage weight in pounds x Dunnage factor

1 oz./ 16 oz. X 8 (cellulose) - 0.5 units

One ounce of cellulose material as dunnage would require an additional 1/2 unit. Adding 1/2 unit dunnage for the package calculation (above) totals:

For a flexible barrier package - 4 units + 0.5 units = 4.5 units
Required for protection is 5 units (4 unit bag + 1 unit bag.)

For rigid metal container package - 1 unit + 0.5 unit = 1.5 units
Closest available size is a 2 unit bag.

Round off the number of units required to the next largest unit rather than the next lowest.

Chart

Hair Felt & Wood Bound Fibers Glass Fibers Synthetic Foams
& Rubber
Units Desiccite 25
Required

0.3 oz.
0.7 oz.
1.0 oz.
2.0 oz.
4.0 oz.
8.0 oz.
1 lb.
2 lb.
10 lb.

 0.4 oz.
.09 oz.
1.3 oz.
2.7 oz.
5.3 oz.
10.7 oz.
1.3 lb.
2.7 lb.
13.3 lb.

 1.3 oz.
2.7 oz.
4.0 oz.
8.0 oz.
1.0 lb.
2.0 lb.
4.0 lb.
8.0 lb.
40.0 lb.

 5.3 oz.
10.7 oz.
1 lb.
2 lb.
4 lb.
8 lb.
16 lb.
32 lb.
160 lb.

 1/6
1/3
1/2
1
2
4
8
16
80


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