Frequently Asked Questions

Calcium chloride is used in a variety of applications and to achieve a range of results. Below you will find answers to frequently asked questions we receive about the use of calcium chloride, services and assistance available from OxyChem, and other topics. Visit our dedicated “FAQ” pages for answers to questions specifically about dust control, road base stabilization and full-depth reclamation and ice melting. Answers to general questions and questions about food, concrete acceleration and other applications are provided here.*

How can I get a copy of the kosher certificate for food-grade calcium chloride products?
Are allergen, GMO and other certification statements available for food grade calcium chloride products?
Are OxyChem’s food grade calcium chloride product facilities audited?
Is nutritional information available for food grade calcium chloride products?
Are OxyChem calcium chloride products NSF-certified for treatment of drinking water?
Does OxyChem have a calcium chloride product recommended for use in drinking water applications?
What are the recommendations for addition of calcium chloride to concrete when used as an accelerating admixture?
Are there applications where calcium chloride should not be used as a concrete accelerating admixture due to potential corrosion issues with reinforcing steel?
Can OxyChem calcium chloride products be used to adjust the calcium hardness in pool and spa water?
What are the recommendations for use of calcium chloride to freeze-proof water-filled containers?
How do I make solutions by mixing solid calcium chloride products with water?
Do OxyChem calcium chloride products meet the REACH (Registration, Evaluation and Authorization of Chemicals) requirements set forth by the European Union?
How should packages of solid calcium chloride be stored?
How can I obtain sales specifications for OxyChem calcium chloride products?
What are the HMIS and NFPA ratings for OxyChem calcium chloride products?
How can I dilute a liquid calcium chloride solution to hit a lower concentration target?
What materials of construction are recommended for storing liquid calcium chloride solutions?
What is the pH of an OxyChem calcium chloride solution?
Can solid calcium chloride that has caked be made usable again?
Is calcium chloride safe for use around grassy areas and other vegetation?
Does OxyChem have a calcium chloride product approved by the EPA as an inert ingredient for pesticide formulations?
What is the shelf life of OxyChem's calcium chloride packaged product?

Q: How can I get a copy of the kosher certificate for food-grade calcium chloride products?

A: A copy of the current kosher certificate for all OxyChem food grade calcium chloride products can be obtained here.

 

Q: Are allergen, GMO and other certification statements available for food grade calcium chloride products?

A: Yes. Please Contact Us for details.

 

Q: Are OxyChem’s food grade calcium chloride product facilities audited?

A: Yes. Located in Ludington, Michigan, the facilities associated with the manufacture and packaging of OxyChem's food grade calcium chloride products undergo an annual audit of Good Manufacturing Practices and Food Safety Systems conducted by a reputable, independent auditor.

Please Contact Us for additional information.

 

Q: What is the shelf life of OxyChem's calcium chloride packaged product?

A: When properly stored to protect from moisture contact, the expected shelf life of all OxyChem calcium chloride packaged products is 36 (thirty-six) months.
 

Q: Is nutritional information available for food grade calcium chloride products?

A: Yes. Please refer to Product Information Sheets available for the following food grade products:

BRINERS CHOICE™ Anhydrous Calcium Chloride Pellets
Food Grade Anhydrous 94-97% Calcium Chloride Pellets
LIQUIDOW™ Food Grade Calcium Chloride Solution

 

Q: Are OxyChem calcium chloride products NSF-certified for treatment of drinking water?

A: No. OxyChem calcium chloride products are not certified per NSF/ANSI 60, Drinking Water Treatment Chemicals; or NSF/ANSI 61, Drinking Water System Components.


Q: Does OxyChem have a calcium chloride product recommended for use in drinking water applications?

A: No. OxyChem recommends against using our calcium chloride in drinking water applications due to the presence of impurity bromide. Bromide can react with oxidizers used for water sterilization to form bromate. In many countries, drinking water standards restrict bromate to very low levels. These standards may not be met if drinking water is treated with our calcium chloride and sterilized with oxidizing chemicals, such as ozone.

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Q: What are the recommendations for addition of calcium chloride to concrete when used as an accelerating admixture?

A: The amount of calcium chloride used should not exceed 2% and application rates should vary with temperature. Addition rate specific recommendations may be found in the document referenced below. Calcium chloride should preferably be added in solution form to aggregates in the mixer drum or as a portion of the mixing water. Add calcium chloride at the ready mix plant if the concrete will be discharged within one hour of the start of mixing. Otherwise, add it at the job site, mixing for at least three minutes or 30 revolutions of the mixer, whichever is longer. If dry calcium chloride is used, it should be free of lumps and added to aggregates in the mixer drum before mixing, or to the mixed concrete just before discharge. Please refer to the publication Calcium Chloride in Portland Cement Concrete for more complete information about the use of calcium chloride as an accelerating admixture.

 

Q: Are there applications where calcium chloride should not be used as a concrete accelerating admixture due to potential corrosion issues with reinforcing steel?

A: Consult the most recent reports from the following American Concrete Institute (ACI) committees for information about the amounts of calcium chloride that are allowed in concrete under various exposure conditions, and conditions in which calcium chloride should not be used. Relevant reports include:

ACI 201 Durability of Concrete
ACI 212 Admixtures for Concrete
ACI 222 Corrosion of Metals in Concrete
ACI 306 Cold Weather Concreting
ACI 318 Standard Building Code for Reinforced Concrete


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Q: Can OxyChem calcium chloride products be used to adjust the calcium hardness in pool and spa water?

A: Yes. However, because solid calcium chloride currently manufactured by OxyChem contains approximately 6000 - 8500 ppm bromide, users should be aware of potential interactions with other pool chemicals. While the presence of bromide in pool and spa water is not uncommon – it is often present in disinfectants – it can react with other chemicals to form unwanted disinfection by-products. Please refer to the publication Pool and Spa Water Treatment Applications for information about the use of calcium chloride to adjust the calcium hardness in pool and spa water.

 

Q: What are the recommendations for use of calcium chloride to freeze-proof water-filled containers?

A: Technical grades of solid and liquid calcium chloride may be used to freeze-proof water-filled containers, such as traffic barriers. The target concentration depends primarily on the level of freeze protection desired. See below for the freeze points of typical concentrations. Use our helpful Making Solutions Calculator tool to determine the amount of dry calcium chloride to mix with water to achieve solutions of various concentrations.

Wt% Sp. Gr. labs/gal Freeze Pt.
16%  1.149  9.55  +8°F 
20%; 1.189  9.88  -4°F 
24% 1.228  10.20  -20°F 
28%  1.275  10.60  -46°F 
32%  1.322  10.99  17°F 

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Q: How do I make solutions by mixing solid calcium chloride products with water?

A: Use cool water when creating solutions. Significant heat is released when dissolving solid calcium chloride. Add solid calcium chloride slowly while continuously mixing. If solids are allowed to sit motionless while in contact with water, a hard cake will form that will be slow to dissolve.

When solid calcium chloride is dissolved, a temperature increase will occur and will vary depending on the conditions associated with each specific application. For example, when dissolving DOWFLAKE™ Xtra 83-87% Calcium Chloride Flakes, assume a temperature increase of 2.8°F per percentage increase in concentration. When making up a 30% solution, the temperature can be expected to increase approximately 84°F (30 x 2.8°F = 84°F).

Use our helpful Making Solutions Calculator tool to determine the amount of dry calcium chloride to mix with water to achieve solutions of various concentrations.

 

Q: Do OxyChem calcium chloride products meet the REACH (Registration, Evaluation and Authorization of Chemicals) requirements set forth by the European Union?

A: OxyChem is committed to comply with REACH, the EU regulatory system for chemicals management to protect the environment and preserve the future of the chemicals industry in Europe.  OxyChem successfully registered calcium chloride under REACH. OxyChem’s European Safety Data Sheets will reflect the registration numbers and exposure data required by REACH.

Please Contact Us for additional information.

 

Q: How should packages of solid calcium chloride be stored?

A: Solid calcium chloride is both hygroscopic and deliquescent. This means that the product can absorb moisture from the air, even to the point of converting to liquid brine. For this reason, protecting solid calcium chloride from excessive moisture exposure is the primary requirement to maintain product quality while in storage.

Packaged calcium chloride should be stored in a dry place. Avoid storing in areas where product leakage could cause damage. Some types of bags (i.e. valve closure bags) do not seal well if stored standing on end and should be stored lying flat. Opened packages should be tightly resealed after each use to prevent caking and liquid brine formation that may result from exposure to humid air.

Palletized product covered by an intact plastic shroud may be stored outdoors on a well-drained asphalt or concrete surface. If the shroud is torn, pierced or removed, the palletized product should be stored indoors or under a waterproof covering. Products packaged in drums or FIBCs (aka. Super Sacks or Big Bags) are typically not shrouded. Therefore, these packages should be stored indoors or under a waterproof covering.

Solid calcium chloride is temperature-stable under all ambient storage conditions.

For additional information, see Calcium Chloride: A Guide to Handling and Storage.

 

Q: How can I obtain sales specifications for OxyChem calcium chloride products?

A: View sales specifications using the product links below.
Anhydrous 94-97% Mini Pellets
BRINERS CHOICE™ Anhydrous Calcium Chloride Pellets
COMBOTHERM™ Blended Deicer
Calcium Chloride 83-87% Granulated
DOWFLAKE™ Xtra 83-87% Calcium Chloride Flakes
Food Grade Anhydrous 94-97% Calcium Chloride Pellets
LIQUIDOW™ Technical Grade Calcium Chloride Solution
LIQUIDOW™ Food Grade Calcium Chloride Solution
PELADOW™ DG Calcium Chloride Briquettes
PELADOW™ Premier Snow & Ice Melter

 

Q: What are the HMIS and NFPA ratings for OxyChem calcium chloride products?

A: HMIS is rated on a 1-4 scale using National Paint & Coatings Association HMIS: Rating Instructions, 2nd Edition as follows:
Health: 2
Flammability: 0
Reactivity: 0

NFPA 704 Hazard Identification Rating is on a 0-4 scale as follows:
Health: 1
Flammability: 0
Reactivity: 0

This information is provided in Section 16 of each Material Safety Data Sheet. View sheets for individual products by visiting the product pages below.
Anhydrous 94-97% Mini Pellets
BRINERS CHOICE™ Anhydrous Calcium Chloride Pellets
COMBOTHERM™ Blended Deicer
Calcium Chloride 83-87% Granulated
DOWFLAKE™ Xtra 83-87% Calcium Chloride Flakes
Food Grade Anhydrous 94-97% Calcium Chloride Pellets
LIQUIDOW™ Technical Grade Calcium Chloride Solution
LIQUIDOW™ Food Grade Calcium Chloride Solution
PELADOW™ DG Calcium Chloride Briquettes
PELADOW™ Premier Snow & Ice Melter

 

Q: How can I dilute a liquid calcium chloride solution to hit a lower concentration target?

A: There are three different dilution options: (1) dilute with water; (2) dilute with lower concentration calcium chloride solution; or (3) dilute with both water and lower concentration calcium chloride solution. All three of these scenarios are covered in our easy-to-use Diluting Solutions Calculator tool.

 

Q: What materials of construction are recommended for storing liquid calcium chloride solutions?

A: The preferred material of construction for large liquid storage tanks is carbon steel with an epoxy-based interior coating and a durable, high-quality coating on the exterior. Non-metallic materials, such as fiberglass or plastic, work well for smaller tanks storing product at ambient temperature; however, these materials are not as durable as carbon steel and they lose strength at high temperature.

For additional information refer to the publication Calcium Chloride: A Guide to Handling and Storage.

 

Q: What is the pH of an OxyChem calcium chloride solution?

A: Accurate and consistent pH measurement in concentrated salt solutions is quite challenging. Results will vary significantly depending on the type of pH probe used and to what degree (if any) the solution is diluted prior to measurement. OxyChem calcium chloride products are somewhat alkaline due to the presence of a small amount of calcium hydroxide impurity. The pH reading for an undiluted sample of 35% solution should be approximately 9.

 

Q: Can solid calcium chloride that has caked be made usable again?

A: When calcium chloride is stored in a manner that allows contact with humid air, the product is likely to become caked. If lightly caked, the product may be broken up into usable form by knocking the closed package against a hard surface, similar to breaking up a bag of ice purchased from a convenience store. In other cases, the caked product may be too hard for this approach to be effective. Use of forceful hammering is not likely to be effective and is not recommended, as flying chips of product could be a hazard, particularly to the eyes. Caked product that cannot be broken up into usable form may be disposed of according to the guidance on the product label.


Q: Is calcium chloride safe for use around grassy areas and other vegetation?

A: Under typical application conditions, calcium chloride will not damage grass or vegetation adjacent to surface being deiced. As with fertilizer and any other deicer, it is possible for grass to be damaged if the chloride based deicer is over-applied or large quantities are directly applied to the grass or vegetation.

For additional information refer to the publication A Review of Deicers and their Effect on Vegetation



Q: Does OxyChem have a calcium chloride product approved by the EPA as an inert ingredient for pesticide formulations?

A: Yes. DOWFLAKE™ Xtra 83-87% Calcium Chloride Flake is approved by the EPA as an inert ingredient for pesticide formulations (Reference: 40CFR 180). Approved uses include:
• Stabilizer in pesticide formulations applied to growing crops or to raw agricultural commodities after harvest
• Stabilizer in pesticide formulations applied to animals
• Non-food use pesticide product formulations
• Antimicrobial pesticide formulations applied to dairy processing equipment and food processing equipment and utensils
• Pesticide formulations for food processing equipment and utensils when the end-use concentration of the trade name product does not exceed 19.5 ppm

*This information is not intended to be all-inclusive as to the manner and conditions of use, handling, storage, disposal and other factors that may involve other or additional legal, environmental, safety or performance considerations, and OxyChem assumes no liability whatsoever for the use of or reliance upon this information. While our technical personnel will be happy to respond to questions, safe handling and use of the product remains the responsibility of the customer. No suggestions for use are intended as, and nothing herein shall be construed as, a recommendation to infringe any existing patents or to violate any Federal, State, local or foreign laws.