9/10/2023 0 Comments Cobalt dichloride![]() Humidity indicators are used to quickly detect moisture and humidity levels in packaging (inc.Cobalt dichloride is a chemical regulated under European Chemical Bureau (ECB) REACH and has been identified as a substance of concern for the environment and for that reason Cobalt Dichloride Free HIC’s provide electronic and semiconductor manufacturers with an IPC/JEDEC J-STD-0.33 compliant humidity card that is free of Cobalt Dichloride and complies with evolving EU and WEEE directives regarding hazardous substances. Cobalt Dichloride FreeĬobalt dichloride is a chemical that changes colour when exposed to changing storage levels of moisture and is commonly used in HIC’s for that purpose. Cartons have a batch number for QA traceability. Our Standard Humidity Indicator Cards and Cobalt Dichloride Free Humidity Indicator Cards are available in three spot, four spot and six spot. Humidity Indicator Cards generally range from one spot to six spot cards. ![]() The indicator spots on the HICs change colour from blue to pink as humidity increases and from pink to blue as humidity decreases. ![]() The cards are reversible and change as conditions change in the packing environment, allowing users to monitor the conditions of product packaging. In order to constantly verify that dry packaging methods are not compromised during storage and transport of products, Humidity Indicator Cards allow users along the supply chain to monitor the packages conditions. This indicates that the barrier bag and the desiccants have functioned correctly. When the bag is opened, the card can be examined for proper dryness inside the bag. The humidity inside dry packed moisture barrier bags can be monitored by including a humidity indicator card inside. Each Humidity Indicator Card is printed with moisture sensitive spots, which respond to various levels of humidity with a visible colour change from blue to pink. They are a low-cost method of indicating humidity conditions inside a moisture barrier bag after vacuum packing. Water indicator, especially in desiccantsĬobalt dichloride is a strong allergen, with a LD 50 of 80 mg/kg (rats).Įye and hand protection should be worn while handling this compound.Ĭobalt(II) chloride should be stored in an airtight container or bag to counter its strong hygroscopic nature.Ĭobalt dichloride should be converted to an insoluble form before disposal.Standard Cobalt Dichloride Free Humidity Indicator Cards (HIC’s) are used to determine when products have been exposed to moisture and humidity above recommended storage levels.Cobalt chloride can be used for the synthesis of many complexes, such as Hexamminecobalt (III) chloride and Potassium cobaltinitrite.It can also be found in some types of colored silica gel, though the amount is small.Ĭobalt(II) chloride, along with other cobalt(II) compounds is classified as "Substance of very high concern" in the EU and its sale is regulated. All three hydrates are hygroscopic, with the anhydrous a light blue color, and the di and heptahydrate violet. ![]() Three hydrates of cobalt chloride exist, anhydrous, dihydrate, and hexahydrate. If heptahydrate crystals are desired the solution may be dried in a desiccator.Ĭobalt(II) chloride can be purchased from chemical suppliers, both as a solid and as a solution. Cobalt (II) chloride is a colorful compound with the formula CoCl2. Diesel Fuel (20, 30, 40, 50) A Diethyl Ether (ethyl ether, ether) B. Usually, there will be a layer of unreacted cobalt carbonate/other contaminants that must be filtered out using either vacuum or gravity filtration in order to receive a pure product.īy heating this solution to dryness a light blue powder will be formed which is anhydrous cobalt chloride. Dichloroethylene B Dichloroisopropyl Ether. Add a small amount of acid and then stir the mixture before adding another small portion, as the CO2 created can cause the mixture to overflow. The density for the three forms is 3.356 g/cm 3 (anhydrous), 2.477 g/cm 3 (dihydrate), 1.924 g/cm 3 (heptahydrate).Ĭobalt chloride heptahydrate can be synthesized by reacting two moles of hydrochloric acid with one mole of cobalt carbonate. CoCl 2 is soluble in water (52.9 g/100 mL at 20 ☌) methanol (38.5 g/100 mL), and slightly soluble in acetone, diethyl ether. The compound melts at 735 ☌ (anhydrous), 100 ☌ (dihydrate), 86 ☌ (hexahydrate). Cobalt(II) chloride is a salt that is blue when anhydrous and pink-purple when hydrated. xCo Cobalt carbonate ( CoCO3 ) 513-79-1 A451-6297 CH2O3.Co Cobalt carbonyl ( Co2 ( CO ) 8 ) 1 A451-6314 C8C0208 Cobalt chloride (. ![]()
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