Thòaⁿ-sng

Thòaⁿ-sng
Structural formula	Ball-and-stick model
Hō-miâ
	Iu-sian ê IUPAC hō-miâ Carbonic acid
	Kî-tha hō-miâ Carbon dioxide solution; Dihydrogen carbonate; Hydrogen bicarbonate; Acid of air; Aerial acid; Hydroxymethanoic acid
Sek-pia̍t-hō]
CAS Number	463-79-6 ;
3D model (JSmol)	Interactive image;
ChEBI	CHEBI:28976 ;
ChEMBL	ChEMBL1161632 ;
ChemSpider	747 ;
ECHA InfoCard	100.133.015
EC Number	610-295-3
KEGG	C01353 ;
PubChem CID	767;
	InChI InChI=1S/CH2O3/c2-1(3)4/h(H2,2,3,4) Key: BVKZGUZCCUSVTD-UHFFFAOYSA-N ; InChI=1/CH2O3/c2-1(3)4/h(H2,2,3,4) Key: BVKZGUZCCUSVTD-UHFFFAOYAU;
	SMILES O=C(O)O;
Sèng-chit
Hòa-ha̍k-sek	H2CO3
Mole chit-liōng	62.03 g/mol
Bi̍t-tō͘	1.668 g/cm3
Tī chúi ê iûⁿ-kái-tō͘	Ka-ta tī iông-e̍k ún-tēng
Acidity (pKa)	3.6 (pKa1 ka-ta H2CO3), 6.3 (pKa1 hâm CO2(aq)), 10.32 (pKa2)
Conjugate base	Bicarbonate
Koan-liân hòa-ha̍p-bu̍t
Koan-liân hòa-ha̍p-bu̍t	Acetone ; Urea ; Carbonyl fluoride
Gûi-hiám
NFPA 704	0 0 1
	Tû-liáu te̍k-pia̍t chí chhut, chu-liāu sī kun-kù bu̍t-chit ê piau-chún chōng-thài (tī 25 °C [77 °F], 100 kPa).
	cha-chèng ( sī siáⁿ ?)
	Infobox chham-chiàu

Thoàⁿ-sng (炭酸), hoà-ha̍k-sek H₂CO₃, sī chi̍t khoán bô-ki sng, mā sī jio̍k-sng.

Chham-chiàu