What is Manganese Chloride?
Manganese chloride (CAS Number: 13446-34-9) is an inorganic chemical compound composed of manganese and chloride ions. It serves as a bioavailable source of manganese, an essential trace element required for normal bone development, metabolism, and antioxidant function in humans. Manganese chloride exists in various hydrated forms, with the dihydrate and tetrahydrate being most common in industrial applications.
Common Uses
Manganese chloride is primarily used in pharmaceutical and dietary supplement formulations rather than as a direct food additive. It appears in multivitamin products, mineral supplements, and specialized nutritional formulations designed for individuals at risk of manganese deficiency. In some countries, it may be incorporated into fortified foods or infant formula, though such applications are not widely documented in the United States. The compound is also used in non-food applications including battery production, textile manufacturing, and chemical synthesis.
Safety Assessment
Manganese is an essential nutrient with established dietary requirements. The National Academies of Sciences, Engineering, and Medicine recommends adequate intake levels ranging from 1.2-2.3 mg/day for adults, depending on age and sex. Manganese chloride, as a source of this mineral, is generally recognized as safe at appropriate dietary levels.
The toxicological profile of manganese is well-established. Excessive manganese exposure, particularly through inhalation in occupational settings, can cause neurological effects; however, oral exposure through food and supplements at normal intake levels has not demonstrated similar concerns in human studies. The FDA has not received adverse event reports associated with manganese chloride as a food ingredient.
Absorption of manganese from chloride salts is variable and influenced by dietary factors including iron and calcium intake. The body maintains homeostasis through hepatobiliary excretion, limiting accumulation from typical dietary sources.
Regulatory Status
Manganese chloride is not on the FDA's Generally Recognized As Safe (GRAS) list as a direct food additive for the general population. However, manganese compounds are permitted in dietary supplements under the Dietary Supplement Health and Education Act (DSHEA). The European Food Safety Authority (EFSA) has assessed manganese and established tolerable upper intake limits at 11 mg/day for adults based on neurological considerations, primarily from occupational exposure data.
In the United States, manganese chloride may be used in infant formula and medical foods under specific regulatory frameworks, subject to FDA oversight and nutritional adequacy standards. Its use in conventional foods remains limited and typically requires pre-market approval or substantiation of safe use.
Key Studies
Clinical research on manganese supplementation has focused primarily on bone health and metabolic function. Studies published in the American Journal of Clinical Nutrition have examined manganese's role in connective tissue formation and carbohydrate metabolism. Research on mineral bioavailability indicates that chloride salt forms of manganese are effectively absorbed, with absorption rates comparable to other manganese compounds.
Neurological safety studies in animal models have established no-observed-adverse-effect levels (NOAELs) for oral manganese exposure significantly higher than typical dietary intake. However, the scientific literature emphasizes distinction between dietary and occupational exposure scenarios.
No significant adverse events or food safety recalls involving manganese chloride have been documented by the FDA, supporting its safety profile at levels used in nutritional applications. The lack of adverse event reports, combined with manganese's essential nutrient status, indicates a favorable safety record for properly formulated products containing this compound.