Generic Materials Search: langbeinite

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Langbeinite
Allowed
Crop Fertilizers and Soil Amendments
Nonsynthetic
Also known as sulfate of potash magnesia. See also MINED MINERALS – UNPROCESSED.
205.203(d)(2) A mined substance of low solubility.
Potassium Sulfate – nonsynthetic
Allowed
Crop Fertilizers and Soil Amendments
Nonsynthetic
Only if from langbeinite or other nonsynthetic sources. See also MINED MINERALS – UNPROCESSED.
205.203(d)(3) A mined substance of low solubility.
Sulfate of Potash Magnesia
Allowed
Crop Fertilizers and Soil Amendments
Nonsynthetic
From langbeinite or other nonsynthetic mineral sources. See also MINED MINERALS – UNPROCESSED.
205.203(d)(3) A mined substance of low solubility.