What is the indicator in DRIERITE?
Table of Contents
What is the indicator in DRIERITE?
cobalt chloride
PROPERTIES. Indicating DRIERITE is impregnated with cobalt chloride. Indicating DRIERITE is blue when dry and changes to pink upon absorption of moisture. The color change is pronounced and clearly visible.
How does DRIERITE work?
For the drying of liquids, DRIERITE instantly absorbs 6.6 weight percent water by chemical action, creating the hemihydrate of calcium sulfate. For the drying of gases, DRIERITE has a water capacity of 10 to 14 weight percent. This increased capacity is due to combined chemical and capillary action.
Is DRIERITE hazardous waste?
As such indicating drierite is deemed a particularly hazardous substance (PHS) by EH&S and you need approval before using it.
How do you regenerate DRIERITE?
Q: Can Drierite be regenerated and used again? A: Yes, Drierite can be regenerated by spreading the granules in a tray and heating them in an oven at about 425°F (220°C) for 1 to 1.5 hours.
How long does drierite last?
For short term storage – two to four weeks – we suggest that you use eight ounces of DRIERITE for every 20 sq. ft. of 4-mil polyethylene, plus sufficient DRIERITE to remove the water in the contents of the bag or container. For medium term storage – one to three months – use eight ounces for each 10 sq.
Can you overheat desiccant?
Care should be taken not to overheat DRIERITE Desiccants. High temperatures can alter the crystal structure and render the desiccants permanently inactive.
How long does DRIERITE last?
Does DRIERITE absorb CO2?
Drierite absorbs small amounts of carbon dioxide (CO2) unless conditioned properly before use.
Can drierite be thrown away?
WASTE DISPOSAL METHOD: THIS MATERIAL CAN BE DISPOSED OF IN ACCORDANCE WITH PROCEDURES ACCEPTABLE UNDER FEDERAL, STATE, AND LOCAL REGULATIONS. PRECAUTIONS TO BE TAKEN IN HANDLING AND STORING: KEEP CONTAINER CLOSED. STORE IN COOL DRY PLACE.
Is calcium sulfate soluble in methanol?
Solubility (g/100 g of solvent): glycerol 97%: 5.16 (15°C) [Ref.] methanol: insoluble [Ref.]
Can you dry DRIERITE?
Exhausted Commercial DRIERITE or Du-Cal DRIERITE should be spread about 1 inch deep in shallow pans and heated in a oven at 450°F or 230°C for 2 hours to achieve complete dehydration. The regenerated material should be placed in the original container and sealed while hot.
Can you regenerate desiccant?
Yes, you can regenerate desiccant start by emptying the desiccant into a clean baking dish. Bake desiccant at 350º for two hours, or until silica gel particles turn dark blue, in a conventional oven (do not use a microwave).
How long is drierite good for?
What is the mesh for drierite?
8 mesh
Drierite® is anhydrous calcium sulfate, granule size is 8 mesh.
How fast does desiccant work?
For example, activated clay, silica gel, and molecular sieves can all absorb approximately 10% of water when exposed to 25°C/75%RH for 1 hour,16 leading to a significant loss of protection effect for products.
Can calcium chloride go down the drain?
In most areas, calcium chloride is considered safe to pour down the drain as long as it’s in an aqueous solution (dissolved in water).
Can sodium chloride go down the drain?
Certain non-hazardous lab wastewaters such as salt and buffer solutions can be safely disposed of in the sink while still maintaining compliance with Environmental Regulations.
How do you test for calcium sulfate?
- Procedure. Add one drop of 1M sulfuric acid to the test drop of the aqueous salt solution on a flat object slide.
- Positive test result.
- Samples containing both calcium and sulfate.
- Further observations.
- Literature.
What is the pH of calcium sulfate?
The pH of a saturated solution of calcium sulfate is 7.7, close to that of pure water.
