碳酸(suan)鈣是一(yi)種(zhong)無機化(hua)(hua)合物(wu)(wu)，化(hua)(hua)學(xue)式為CaCO?，俗稱灰石(shi)(shi)(shi)、石(shi)(shi)(shi)灰石(shi)(shi)(shi)、石(shi)(shi)(shi)粉、大理(li)(li)石(shi)(shi)(shi)等。碳酸(suan)鈣呈(cheng)中(zhong)性，基本(ben)上(shang)不溶(rong)(rong)于(yu)水(shui)，溶(rong)(rong)于(yu)鹽酸(suan)。它是地球上(shang)常見物(wu)(wu)質之一(yi)，存(cun)在于(yu)霰石(shi)(shi)(shi)、方解石(shi)(shi)(shi)、白堊、石(shi)(shi)(shi)灰巖、大理(li)(li)石(shi)(shi)(shi)、石(shi)(shi)(shi)灰華等巖石(shi)(shi)(shi)內，亦(yi)為動(dong)物(wu)(wu)骨骼或(huo)外殼(ke)的主要成分。碳酸(suan)鈣也(ye)是重要的建(jian)筑材料(liao)，工(gong)業(ye)上(shang)用(yong)途甚(shen)廣。

海南碳酸鈣價格由于(yu)重(zhong)(zhong)質(zhi)(zhi)(zhi)碳(tan)(tan)酸(suan)(suan)鈣的沉降(jiang)(jiang)體積(ji)比輕質(zhi)(zhi)(zhi)碳(tan)(tan)酸(suan)(suan)鈣的沉降(jiang)(jiang)體積(ji)小，所以稱(cheng)之(zhi)為(wei)重(zhong)(zhong)質(zhi)(zhi)(zhi)碳(tan)(tan)酸(suan)(suan)鈣。性質(zhi)(zhi)(zhi)：白(bai)色粉末。無(wu)臭、無(wu)味。露置空氣(qi)中(zhong)無(wu)變化(hua)，比重(zhong)(zhong)2.710。熔(rong)點(dian)1339℃。幾乎不溶于(yu)水在含有(you)銨鹽(yan)(yan)或三氧化(hua)二鐵的水中(zhong)溶解，不溶于(yu)醇(chun)。遇(yu)稀(xi)醋(cu)酸(suan)(suan)、稀(xi)鹽(yan)(yan)酸(suan)(suan)、稀(xi)硝酸(suan)(suan)發生泡沸，并溶解。加熱分解為(wei)氧化(hua)鈣(CaO)和二氧化(hua)碳(tan)(tan)(CO?)。采(cai)用不同粉碎加工設備(bei)，可生產出：400目(mu)(mu)、500目(mu)(mu)、600目(mu)(mu)、800目(mu)(mu)、1000目(mu)(mu)、1250目(mu)(mu)、2500目(mu)(mu)、5000目(mu)(mu)各(ge)種(zhong)粒徑的重(zhong)(zhong)質(zhi)(zhi)(zhi)碳(tan)(tan)酸(suan)(suan)鈣，又因造紙、涂(tu)料、顏料的特種(zhong)需要還可以研磨生成2μm以下重(zhong)(zhong)質(zhi)(zhi)(zhi)鈣。