SODIUM META SILICATE PENTA HYDRATE (SODYUM METASILIKAT PENTA HDRAT)
Sodium metasilicate; SODIUM SILICATE; Waterglass; Sodium sesquisilicate; Sodium siliconate; Sodium polysilicate; monosodium metasilicate; sodium metasilicate; sodium metasilicate nonahydrate; Sodium metasilicate; SODIUM SILICATE; Waterglass; Sodium sesquisilicate; Sodium siliconate; Sodium polysilicate; Sodium silicate glass; Water glass; 6834-92-0; disodium oxosilanediolate; Sodium silicate solution; Sodium water glass; Disodium monosilicate; Britesil; Crystamet; Orthosil; Sikalon; Silican; Carsil;Dryseq; Soluble glass; Agrosil S; Silicic acid, sodium salt; Agrosil LR; Portil A; Silica E; Silica K; Silica N; Silica R; Simet A; Pyramid 1; Pyramid 8; Carsil (silicate); Britesil H 20; Britesil H 24; Disodium metasilicate; Metso beads, drymet; Metso pentabead 20; Silicic acid (H2SiO3), disodium salt; Metso 20; Metso 99;
Metso beads 2048; Caswell No. 792; SODIUM-m-SILICATE; as Bond 1001; L 96 (salt); 1344-09-8; disodium dioxido(oxo)silane; HK 30 (van); disodium oxosilanebis(olate); Silicic acid, disodium salt; Sodium metasilicate anhydrous; Sodium silicate (Na2SiO3); Silicic acid (H2SiO3) , disodium salt; Sodium metasilicate, anhydrous; 49FG; HSDB 753; Sodium metasilicate (Na2SiO3); CHEBI:60720; HSDB 5028; EINECS 215-687-4; EINECS 229-912-9; N 38; Q 70; Silicic acid (H2SiO3), sodium salt (1:2); 84992-49-4; B-W; silica standard; Sodiummetasilicate; sodium m-silicate; sodium meta silicate; sodium silicate, meta; Na2SiO3; AC1L2LZG; AC1NPT2S; Sodium trisilicate solution; Epitope ID:158534; AC1Q1UQ0; UNII-IJF18F77L3; sodium metasilicate n-hydrate; 71746_ALDRICH; 13726_RIEDEL; 307815_ALDRICH; 71746_FLUKA; CTK8G3162; MolPort-003-938-719; 13726_SIAL; UNII-052612U92L; MFCD00003492; AKOS024429002; LS-1581; LS-3222; RL04612; s15025; Silicic acid (CH2SiO3), disodium salt; AN-21286; AN-49132; dipotassium oxo-$l^{5}-silanebis(olate); IN001998; IN019065; P-84; S580; 052612U92L; 15915-98-7 (unspecified hydrochloride salt); 13472-30-5 (H4O4Si tetra-hydrochloride salt); 13870-28-5 (H2O5Si2 di-hydrochloride salt); 13870-30-9 (H2O7Si3 di-hydrochloride salt); 15593-82-5 (H7O7Si2 hexa-hydrochloride salt); 3B4-1729; I14-115094; 10213-79-3 (H2O3Si di-hydrochloride salt pentahydrate); 106985-35-7; 11105-00-3; 37299-97-1; 54249-86-4; 57447-81-1; 65727-85-7; 8014-92-4; 8031-41-2; metsogranular;drymetakeiso5aq;dorimetakeiso5aq;Sodiumsilicatehydrate;SODIUM METASILICATE 5H2O;SODIUM SILICATE, PENTAHYDRATE;SodiumMestasilicatePentahydrate;SODIUM METASILICATE PENTAHYDRATE;Sodium metasilicate pentehydrate;sodiumsilicatehydrate(na2sio3.5h2o)
Sodium silicate is the common name for compounds with the formula Na2(SiO2)nO. A well-known member of this series is sodium metasilicate, Na2SiO3. Also known as waterglass or liquid glass, these materials are available in aqueous solution and in solid form. The pure compositions are colourless or white, but commercial samples are often greenish or blue owing to the presence of iron-containing impurities.
They are used in cements, passive fire protection, textile and lumber processing, refractories, and automobiles. Sodium carbonate and silicon dioxide react when molten to form sodium silicate and carbon dioxide:
Na2CO3 + SiO2 › Na2SiO3 + CO2
Anhydrous sodium silicate contains a chain polymeric anion composed of corner-shared {SiO4} tetrahedral, and not a discrete SiO32- ion.[1] In addition to the anhydrous form, there are hydrates with the formula Na2SiO3·nH2O (where n = 5, 6, 8, 9) which contain the discrete, approximately tetrahedral anion SiO2(OH)22- with water of hydration. For example, the commercially available sodium silicate pentahydrate Na2SiO3·5H2O is formulated as Na2SiO2(OH)2·4H2O and the nonahydrate Na2SiO3·9H2O is formulated as Na2SiO2(OH)2·8H2O.
In industry, the various grades of sodium silicate are characterized by their SiO2:Na2O weight ratio (weight ratios can be converted to molar ratios by multiplication with 1.032), which can vary between 2:1 and 3.75:1.
Grades with this ratio below 2.85:1 are termed alkaline. Those with a higher SiO2:Na2O ratio are described as neutral.