Knowledge (XXG)

Potassium metabisulfite

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It is a component of certain photographic developers and solutions used in photographic processing, keeping active developing species from contact with oxygen.
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A high dose would be 3 grams of potassium metabisulfite per six-gallon bucket of must or around 132 milligrams per liter (yielding roughly 75 ppm of SO
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It is used as a food additive, also known as E224. It is restricted in use and may cause allergic reactions in some sensitive persons.
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Barberá, José Jiménez; Metzger, Adolf; Wolf, Manfred (2000). "Sulfites, Thiosulfates, and Dithionitesl Chemistry".
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Potassium metabisulfite is used in the textile industry for dyeing and cotton printing.
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It is used in tint etching iron-based metal samples for microstructural analysis.
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Potassium metabisulfite is sometimes used to precipitate gold from solution in
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Johnstone, H. F. (1946). "Sulfites and Pyrosulfites of the Alkali Metals".
1132: 934:) prior to fermentation; then 6 grams per six-gallon bucket (150 ppm of SO 962: 658: 651: 644: 617: 536: 175: 167: 1171:"The Truth About Sulfites in Wine & the Myths of Red Wine Headaches" 958: 447: 401: 183: 1219: 532: 969:. This step is called 'stabilizing'. It is also used to neutralize 724:
Except where otherwise noted, data are given for materials in their
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It is used as a bleaching agent in the production of coconut cream.
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Potassium metabisulfite can be prepared by treating a solution of
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InChI=1S/2K.H2O5S2/c;;1-6(2)7(3,4)5/h;;(H,1,2)(H,3,4,5)/q2*+1;/p-2
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and commercial brewers alike. It is not used as much for brewing
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InChI=1/2K.H2O5S2/c;;1-6(2)7(3,4)5/h;;(H,1,2)(H,3,4,5)/q2*+1;/p-2
978: 916: 912: 606: 387: 1223: 923:). Sulfur dioxide is a disinfectant. It also acts as a potent 710: 691: 985:
is almost always boiled, which kills most microorganisms.
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Food allergy: adverse reactions to food and food additives
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Winemaking equipment is sanitized by spraying with a 1% SO
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powder with a pungent odour. It is mainly used as an
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It is used both by 801:, it is chemically very similar to 302:Key: RWPGFSMJFRPDDP-NUQVWONBAF 186: 14: 1104:. Vol. 2. pp. 162–167. 344: 732: 502: 497: 40: 31: 22: 1133:List of E-number food additives 728:(at 25 °C , 100 kPa). 461:Occupational safety and health 356: 350: 1: 2436: 1110:10.1002/9780470132333.ch49 819:bisulfite § Reactions 816: 1196:"Potassium Metabisulfite" 813:Preparation and reactions 722: 683: 478: 458: 453: 382:White crystalline powder 331: 311: 276: 76: 53: 48: 39: 30: 21: 1077:10.1002/14356007.a25_477 549:Precautionary statements 65:Potassium metabisulphite 17:Potassium metabisulfite 1071:. Weinheim: Wiley-VCH. 767:Potassium metabisulfite 2415:Photographic chemicals 1012:(as an alternative to 640: 474:Irritant, asthma risk 68:Dipotassium disulphite 1210:"Color Metallography" 783:potassium pyrosulfite 639: 62:Dipotassium disulfite 59:Potassium pyrosulfite 803:sodium metabisulfite 717:Sodium metabisulfite 622:(fire diamond) 2410:Potassium compounds 1258:H, (pseudo)halogens 1251:Potassium compounds 1102:Inorganic Syntheses 825:potassium hydroxide 809:crystal structure. 698:Potassium bisulfite 427:Solubility in water 374: g·mol 18: 2420:E-number additives 1035:as a preservative. 942:content of wines. 795:chemical sterilant 755:Infobox references 684:Related compounds 641: 16: 2392: 2391: 1894:transition metals 1155:978-0-632-04601-0 861:potassium sulfite 763:Chemical compound 761: 760: 702:Potassium sulfite 672:Safety data sheet 527:Hazard statements 436:g/L (20 °C) 245:CompTox Dashboard 118:Interactive image 2427: 2044: 2030: 2029: 2028: 2020: 2019: 2006: 1992: 1982: 1981: 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dioxide 390: 384: 383: 380: 376: 375: 369: 363: 362: 359: 353: 347: 342: 337: 334: 333: 329: 328: 326: 325: 322: 314: 313: 312: 309: 308: 306: 305: 301: 298: 297: 295: 291: 288: 287: 279: 278: 277: 274: 273: 271: 270: 257: 255: 243: 240: 239: 237: 236: 228: 226: 220: 219: 217: 216: 212: 210: 204: 203: 201: 200: 192: 190: 182: 179: 178: 172: 164: 163: 153: 145: 144: 142: 141: 133: 131: 125: 124: 122: 121: 113: 111: 104: 101: 100: 98: 97: 89: 87: 82: 79: 78: 74: 73: 70: 69: 66: 63: 60: 56: 55: 51: 50: 46: 45: 37: 36: 28: 27: 13: 10: 9: 6: 4: 3: 2: 2432: 2421: 2418: 2416: 2413: 2411: 2408: 2406: 2403: 2402: 2400: 2385: 2371: 2369: 2355: 2353: 2335: 2333: 2319: 2317: 2303: 2301: 2291: 2289: 2275: 2273: 2263: 2261: 2251: 2249: 2243: 2242: 2240: 2236: 2230: 2216: 2214: 2200: 2198: 2184: 2182: 2168: 2166: 2159: 2157: 2147: 2145: 2135: 2133: 2123: 2121: 2115: 2113: 2103: 2101: 2091: 2089: 2071: 2069: 2059: 2057: 2047: 2045: 2033: 2031: 2009: 2007: 1995: 1993: 1985: 1983: 1961: 1959: 1949: 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1172: 1165: 1162: 1157: 1151: 1147: 1140: 1137: 1134: 1129: 1126: 1121: 1119:9780470132333 1115: 1111: 1107: 1103: 1096: 1093: 1088: 1082: 1078: 1074: 1070: 1069: 1061: 1058: 1051: 1047: 1044: 1043: 1039: 1034: 1030: 1027: 1024: 1021: 1018: 1015: 1011: 1007: 1004: 1001: 997: 993: 992: 988: 986: 984: 980: 976: 972: 968: 964: 960: 952: 950: 943: 928: 926: 918: 914: 906: 904: 898: 870: 869: 868: 866: 862: 834: 833: 832: 830: 826: 820: 812: 810: 808: 804: 800: 796: 792: 788: 785:, is a white 784: 768: 756: 749: 744: 727: 721: 718: 715: 712: 707: 706: 703: 699: 696: 693: 688: 687: 682: 679: 676: 673: 670: 669: 662: 655: 648: 624: 621: 620: 616: 615: 553: 550: 546: 545: 531: 528: 524: 523: 520: 517: 514: 510: 509: 505: 500: 496: 493: 489: 488: 484: 482: 477: 473: 468: 467: 463: 462: 457: 452: 449: 446:Insoluble in 445: 443: 440: 439: 431: 428: 424: 423: 419: 417: 416:Melting point 414: 413: 410:g/cm (solid) 405: 403: 400: 399: 395: 391: 389: 386: 385: 381: 378: 377: 370: 368: 365: 364: 343: 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Retrieved 1174: 1164: 1145: 1139: 1128: 1101: 1095: 1066: 1060: 1000:preservative 956: 944: 929: 910: 902: 858: 822: 782: 766: 765: 618: 518: 480: 470:Main hazards 459: 208:RTECS number 77:Identifiers 54:Other names 998:juice as a 975:homebrewers 925:antioxidant 791:antioxidant 787:crystalline 513:Signal word 464:(OHS/OSH): 379:Appearance 332:Properties 156:100.037.072 2399:Categories 1787:B, C group 1626:pnictogens 1372:chalcogens 1175:The Kitchn 1086:3527306730 1052:References 1010:aqua regia 989:Other uses 807:monoclinic 492:Pictograms 442:Solubility 367:Molar mass 233:65OE787Q7W 129:ChemSpider 105:3D model ( 94:16731-55-8 84:CAS Number 1033:aam papad 799:disulfite 678:ICSC 1175 603:P403+P233 595:P332+P313 575:P304+P340 571:P302+P352 483:labelling 392:Pungent ( 215:TT4920000 1040:See also 963:bacteria 797:. As a 619:NFPA 704 454:Hazards 169:E number 2238:organic 959:brewing 748:what is 746: ( 711:cations 448:ethanol 402:Density 184:PubChem 2065:Fe(CN) 2053:Fe(CN) 1917:Pt(CN) 1152:  1116:  1083:  743:verify 740:  709:Other 692:anions 690:Other 674:(SDS) 519:Danger 434:  408:  372:222.31 316:SMILES 49:Names 996:lemon 967:fungi 827:with 281:InChI 197:28019 174:E224 138:26061 107:JSmol 2245:KHCO 2161:KCrO 2117:KMnO 2077:Fe(C 2002:ReBr 1988:KAsF 1955:ReCl 1943:PtCl 1905:PtCl 1822:KHCO 1763:HAsO 1739:KAsO 1475:KHSO 1467:KHSO 1447:KHSO 1363:KSCN 1358:KOCN 1353:KCNO 1314:KBrO 1301:KClO 1293:KClO 1288:KClO 1182:2024 1150:ISBN 1114:ISBN 1081:ISBN 983:wort 979:beer 965:and 953:Beer 917:must 913:wine 907:Wine 899:Uses 891:+ SO 863:and 851:+ H 835:2 SO 831:. 611:P501 607:P405 599:P362 591:P321 587:P312 583:P310 567:P280 563:P271 559:P264 555:P261 541:H335 537:H318 533:H315 406:2.34 388:Odor 224:UNII 2293:KHC 2265:KCF 2253:KCH 2153:CrO 2141:CrO 2129:CrO 2109:MnO 2097:FeO 2040:ZrF 2021:ReI 1973:ReF 1930:TiF 1846:SiF 1834:SiO 1775:AsO 1751:AsO 1731:KPF 1711:HPO 1666:KNO 1658:KNO 1642:KNH 1605:TeO 1593:TeO 1572:SeO 1560:SeO 1430:KHS 1388:KOH 1348:KCN 1343:KAt 1335:KIO 1327:KIO 1309:KBr 1283:KCl 1270:KHF 1106:doi 1073:doi 915:or 883:→ K 793:or 769:, K 481:GHS 432:450 250:EPA 187:CID 2401:: 2381:KO 2365:KO 2327:35 2323:18 2321:KC 2311:23 2307:12 2305:KC 2269:CO 2257:CO 2226:Cl 2222:Mo 2212:13 2206:Cr 2196:10 2190:Cr 2174:Cr 2165:Cl 1874:Al 1858:Al 1814:CO 1771:KH 1723:PO 1719:KH 1699:PO 1687:PO 1683:KH 1650:KN 1617:Po 1584:Te 1551:Se 1459:SO 1439:SO 1413:KO 1405:KO 1322:KI 1278:KH 1265:KF 1173:. 1112:. 1079:. 1016:). 887:SO 867:: 609:, 605:, 601:, 597:, 593:, 589:, 585:, 581:, 577:, 573:, 569:, 565:, 561:, 557:, 539:, 535:, 485:: 396:) 2383:4 2379:7 2377:H 2375:5 2373:C 2367:4 2363:6 2361:H 2359:4 2357:C 2351:4 2349:O 2347:2 2345:K 2343:2 2341:H 2339:3 2337:C 2331:2 2329:O 2325:H 2315:2 2313:O 2309:H 2299:4 2297:O 2295:2 2287:4 2285:O 2283:2 2281:C 2279:2 2277:K 2271:2 2267:3 2259:2 2255:3 2247:2 2228:8 2224:2 2220:4 2218:K 2210:O 2208:4 2204:2 2202:K 2194:O 2192:3 2188:2 2186:K 2180:7 2178:O 2176:2 2172:2 2170:K 2163:3 2155:8 2151:3 2149:K 2143:4 2139:2 2137:K 2131:4 2127:3 2125:K 2119:4 2111:4 2107:2 2105:K 2099:4 2095:2 2093:K 2087:3 2085:) 2083:4 2081:O 2079:2 2075:3 2073:K 2067:6 2063:3 2061:K 2055:6 2051:4 2049:K 2042:6 2038:2 2036:K 2026:6 2017:2 2012:K 2004:6 2000:2 1998:K 1990:6 1978:6 1969:2 1964:K 1957:6 1953:2 1951:K 1945:6 1941:2 1939:K 1932:6 1928:2 1926:K 1919:4 1915:2 1913:K 1907:4 1903:2 1901:K 1884:7 1882:O 1880:2 1878:B 1876:2 1872:2 1870:K 1864:4 1862:O 1860:2 1856:2 1854:K 1848:6 1844:2 1842:K 1836:3 1832:2 1830:K 1824:3 1816:3 1812:2 1810:K 1804:7 1802:O 1800:2 1798:K 1796:4 1794:B 1777:4 1773:2 1765:4 1761:2 1759:K 1753:4 1749:3 1747:K 1741:2 1733:6 1725:4 1721:2 1713:4 1709:2 1707:K 1701:4 1697:3 1695:K 1689:3 1685:2 1678:P 1676:3 1674:K 1668:3 1660:2 1652:3 1644:2 1637:N 1635:3 1633:K 1615:2 1613:K 1607:4 1603:2 1601:K 1595:3 1591:2 1589:K 1582:2 1580:K 1574:4 1570:2 1568:K 1562:3 1558:2 1556:K 1549:2 1547:K 1541:8 1539:O 1537:2 1535:S 1533:2 1531:K 1525:7 1523:O 1521:2 1519:S 1517:2 1515:K 1509:5 1507:O 1505:2 1503:S 1501:2 1499:K 1493:3 1491:O 1489:2 1487:S 1485:2 1483:K 1477:5 1469:4 1461:4 1457:2 1455:K 1449:3 1441:3 1437:2 1435:K 1425:S 1423:2 1421:K 1415:3 1407:2 1399:2 1397:O 1395:2 1393:K 1383:O 1381:2 1379:K 1337:4 1329:3 1316:3 1303:4 1295:3 1272:2 1243:e 1236:t 1229:v 1198:. 1184:. 1158:. 1122:. 1108:: 1089:. 1075:: 1002:. 947:2 940:2 936:2 932:2 921:2 893:2 889:3 885:2 881:5 879:O 877:2 875:S 873:2 871:K 855:O 853:2 849:5 847:O 845:2 843:S 841:2 837:2 779:5 777:O 775:2 773:S 771:2 738:Y 660:0 653:0 646:1 360:2 357:S 354:5 351:O 348:2 345:K 252:) 248:( 109:)

Index

Potassium metabisulfite


CAS Number
16731-55-8
JSmol
Interactive image
ChemSpider
26061
ECHA InfoCard
100.037.072
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E number
(preservatives)
PubChem
28019
RTECS number
UNII
65OE787Q7W
CompTox Dashboard
DTXSID1021293
Edit this at Wikidata
InChI
SMILES
Chemical formula
Molar mass
Odor
sulfur dioxide
Density
Melting point

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