To provide a production method of an amorphous calcium silicate hydrate having high safety properties, having a large elution volume of Ca and Si and excellent in calcification function.SOLUTION: There is provided a production method of an amorphous calcium silicate hydrate in which, calcium hydroxide and sodium silicate and/or potassium silicate are made to react in water, and a pH in a reaction mixture is adjusted to 8-11.SELECTED DRAWING: None【課題】安全性が高く、ＣａとＳｉの溶出量が多く石灰化能に優れる非晶質ケイ酸カルシウム水和物の製造法の提供。【解決手段】水酸化カルシウムとケイ酸ナトリウム及び／又はケイ酸カリウムとを水中で反応させ、反応液のｐＨを８～１１に調整することを特徴とする非晶質ケイ酸カルシウム水和物の製造法。【選択図】なし
