800:
1481:
823:. The supernatant is taken for filtration after standing for 4 hours, the pH of the filtrate is adjusted to 5.5-6.0 with a dilute alkaline solution, then a saturated calcium chloride solution is added to precipitate calcium-lac acid. After 8 hours of clarification . The supernatant is removed, the precipitate is filtered, after filtration, concentrated hydrochloric acid is added, washed with water until the acid is no longer present, and dried to obtain the final lac red pigment.
779:
33:
607:
600:
593:
586:
579:
137:
811:
adjusts to 2.1. Let stand for 3-4 hours, clean and filter. Concentrated sulfuric acid is added to the filtrate until the pigment crystals precipitate, filtered through spun silk (~0.12 mm), the filtrate is allowed to stand for 1-2 days, and then the pigment crystals are precipitated, filtered and washed 3 times by water , dried crush and sift at 60 °C, resulting in a final product with a degree of separation of ~0.8%.
445:
842:
As a major component of lac dye, LCA is usually chosen as a representative for the lac dye to describe their thermodynamics properties including adsorption, dyeability, fastness and shade variation of lac dyeing on silk and cotton. Studies indicate that the intermolecular interactions between LCA and
508:
These derivatives differ through one ramification except for the acid D, which is closer in form to the kermesic acid. Acid laccaic D can be confused or interchanged with flavokermisic acid due to their almost identical structure. These acids can all be represented in a general form (lac-dye), where
810:
Grind the body with the appropriate amount of water, then use 4-5 times the original amount of water for extraction several times. Centrifuge to remove all slag, then add a small amount of sodium hydroxide and calcium chloride solution to the extract, then add dilute chloric acid. The pH slowly
855:
colors, but warmer, softer and more muted. Lac paint has high light and washing fastness on silk and wool. Only small amounts are needed for medium depth shade. Lac is not so fast in cellulose fibers (plant fibers). Lac is very sensitive to pH, increasing alkalinity will turn the colors plummy
790:
collected from Rain trees (mostly located in Asia) can be powdered in a mill and finely ground. The powdered material is extracted with deionized water at 60°C for 1 h. The aqueous solution is filtered and then concentrated under reduced pressure in a rotary evaporator to give a crude lac dye
470:
word laksha, meaning a hundred thousand lice, and came into German via the
Italian “lacca” in the 16th century. The word also exists in Hindi (Lakh) and Sinhala (Lakda). The term Lac Dye comes from English "dye" means paint dye. This pigment is mostly found in South and South-East Asia.
207:
1200:
Oka, Hisao; Ito, Yuko; Yamada, Sadaji; Kagami, Tadaaki; Hayakawa, Junko; Harada, Ken-ichi; Atsumi, Eiichiro; Suzuki, Masanao; Suzuki, Makoto; Odani, Hiroko; Akahori, Setsuko; Maeda, Kenji; Nakazawa, Hiroyuki; Ito, Yoichiro (1998-07-10).
754:
Laccaic acid A has an amide functional group in its structure while the acids B, C, and E have amine groups. The only difference between the acid D and kermesic acid is a hydroxide function missing on the position 8.
479:
Laccaic acids are mainly used to dye natural fabrics (mostly silk, wool, or cotton) and food, including both drinks and solid products. It is one of the most common natural dyes, but it is less used in cosmetics than
295:
InChI=1S/C26H19NO12/c1-8(28)27-5-4-9-2-3-12(29)10(6-9)15-22(33)19-18(24(35)23(15)34)20(31)11-7-13(30)16(25(36)37)17(26(38)39)14(11)21(19)32/h2-3,6-7,29-30,33-35H,4-5H2,1H3,(H,27,28)(H,36,37)(H,38,39)
500:, a Roman writer on a volume about natural history. This pigment made from lac dye, Indian Lake, was listed by Winsor & Newton in their 1896 catalogue.
834:
is inhibited by LCA which has a stronger inhibitory effect than SG-1027 (HY-13962). LCA is a class of DNMT inhibitors may be a useful mechanism to inhibit DNMT.
484:, the main natural dye used in this industry. The bright red colorant gives a lightfast tint to silk and wool. It is a similar color to dyes obtained from
1287:
947:
Park, Jin-Sung; Kim, Seung-Hyun; Kim, Yun-Soon; Kwon, Euna; Lim, Hyun-Jin; Han, Kang-Min; Choi, Yang-Kyu; Jung, Chul-Woo; Kang, Byeong-Cheol (2022-10-31).
565:
560:
555:
550:
545:
308:
856:
purple, while acidity will give bright oranges. However, colors that have been altered by the pH change may turn red again after washing.
949:"Nonclinical safety evaluation of food colorant lac dye via systematic toxicity profiling with assessment of in vivo antigenic potential"
768:
1301:
Adeel, Shahid; Hussaan, Muhammad; Rehman, Fazal-ur; Habib, Noman; Salman, Mahwish; Naz, Saba; Amin, Nimra; Akhtar, Nasim (2018-03-20).
819:
After the dye washing of the wastewater from the shellac cleaning, the pH value of the solution is adjusted to 4.0-4.5 with dilute
763:
Acids A, B, C, and E can be isolated from lac dye through many different ways: microwave induced from lac insects, high speed
97:
69:
286:
116:
76:
400:
1421:
Fagan, Rebecca L.; Cryderman, Diane E.; Kopelovich, Levy; Wallrath, Lori L.; Brenner, Charles (16 August 2013).
799:
54:
1303:"Microwave-assisted sustainable dyeing of wool fabric using cochineal-based carminic acid as natural colorant"
83:
764:
50:
17:
791:
extract, which can then be used without further purification. This extract can be directly named lac dye.
1568:
65:
1250:"Bioactivity-guided isolation of Laccaic Acid-A: A potent anti-cancer agent from Laccifer lacca (Kerr)"
843:
fibers as well as between LCA and mordants play a key role on the adsorption and dyeability of lac dye
1500:
1202:
1007:
745:
738:
733:
728:
723:
718:
1146:
1350:"Isolation and Structure Determination of Laccaic Acid F from Lac-Dye Produced from Thai Sticklac"
43:
1422:
1281:
247:
149:
1249:
923:
851:
Lac extract produces purple colors from burgundy to deep purple. The colors are similar to
183:
1485:
1480:
90:
8:
1573:
173:
1484: This article incorporates text from this source, which is available under the
227:
1457:
1379:
1330:
1182:
983:
948:
1516:
1499:
Kongkachuichay, Paisan; Shitangkoon, Aroonsiri; Chinwongamorn, Nontalee (2002-05-01).
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1023:
448:
Mixture of milk and lac dye - A ceremony welcoming the newly wed bride to her new home
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CC(=O)NCCC1=CC(=C(C=C1)O)C2=C(C3=C(C(=C2O)O)C(=O)C4=CC(=C(C(=C4C3=O)C(=O)O)C(=O)O)O)O
1423:"Laccaic Acid A Is a Direct, DNA-competitive Inhibitor of DNA Methyltransferase 1 *"
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978:
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331:
1318:
1162:
1147:"The red insect dyes: carminic, kermesic and laccaic acids and their derivatives"
1538:
1397:
1203:"Separation of lac dye components by high-speed counter-current chromatography"
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1273:
1226:
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1031:
974:
438:
434:
420:
1439:
1366:
1349:
524:
Acid E (7--3,5,6,8-tetrahydroxy-9,10-dioxoanthracene-1,2-dicarboxylic acid)
518:
Acid C (7--3,5,6,8-tetrahydroxy-9,10-dioxoanthracene-1,2-dicarboxylic acid)
515:
Acid B (3,5,6,8-tetrahydroxy-7--9,10-dioxoanthracene-1,2-dicarboxylic acid)
1466:
1178:
992:
429:
1347:
1234:
521:
Acid D (3,6,8-trihydroxy-1-methyl-9,10-dioxoanthracene-2-carboxylic acid)
787:
493:
778:
713:
362:
238:
1498:
852:
572:
485:
423:
derivatives, designated A through E, which are components of the red
393:
Except where otherwise noted, data are given for materials in their
32:
467:
488:
and kermes. The color of the dye can be modified by the choice of
206:
153:
7--3,5,6,8-tetrahydroxy-9,10-dioxoanthracene-1,2-dicarboxylic acid
606:
599:
592:
585:
578:
489:
481:
463:
424:
372:
259:
136:
1420:
444:
1348:
Dingyu Hu; Akira
Hasegawa; Shin-ichi Nakatsuka (1997-08-01).
831:
218:
196:
496:
dye can be traced back to 250 AD when it was mentioned by
441:. This article focuses primarily on laccaic acid A (LCA).
1300:
1501:"Thermodynamics of adsorption of laccaic acid on silk"
57:. Unsourced material may be challenged and removed.
1199:
1286:: CS1 maint: DOI inactive as of September 2024 (
1560:
1005:
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773:
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182:
1248:Ghosh, Manik; Dey, Suddhasattya (2019-10-14).
946:
1006:Wouters, Jan; Verhecken, André (1987-01-01).
1008:"The chemical nature of flavokermesic acid"
924:"laccaic acid A | C26H19NO12 | ChemSpider"
246:
1456:
1438:
1365:
982:
964:
826:
509:the derivative A is the most important.
117:Learn how and when to remove this message
1247:
798:
777:
769:liquid chromatography-mass spectrometry.
534:
492:from violet to red to brown. The use of
443:
1254:Indian Journal of Traditional Knowledge
1144:
758:
14:
1561:
782:Stick lac next to colored silk strings
712:
226:
55:adding citations to reliable sources
26:
1119:
1094:
1069:
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512:The different derivatives include:
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25:
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31:
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1427:Journal of Biological Chemistry
1414:
1390:
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1151:Biotechnic & Histochemistry
1138:
397:(at 25 °C , 100 kPa).
42:needs additional citations for
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1063:
1038:
999:
940:
916:
891:
866:
765:counter-current chromatography
503:
352:
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13:
1:
1517:10.1016/S0143-7208(02)00014-1
1319:10.1080/15440478.2018.1448317
1219:10.1016/S0021-9673(98)00311-2
1163:10.1080/10520295.2018.1511065
1145:Cooksey, C. J. (2019-02-17).
1024:10.1016/S0040-4039(00)95325-5
859:
815:Color water extraction method
795:Extraction from insect corpse
774:Extraction from the stick lac
527:
466:goes back to the old Indian
457:
7:
1354:Heterocyclic Communications
1207:Journal of Chromatography A
10:
1590:
966:10.3389/fphar.2022.1020379
690:
613:
571:
541:
452:
367:537.44 g·mol
1307:Journal of Natural Fibers
1266:10.56042/ijtk.v18i4.28998
953:Frontiers in Pharmacology
744:
427:obtained from the insect
391:
324:
304:
282:
166:
161:Red lac, Shellac, Lac dye
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1126:pubchem.ncbi.nlm.nih.gov
1101:pubchem.ncbi.nlm.nih.gov
1076:pubchem.ncbi.nlm.nih.gov
1051:pubchem.ncbi.nlm.nih.gov
904:pubchem.ncbi.nlm.nih.gov
879:pubchem.ncbi.nlm.nih.gov
474:
1440:10.1074/jbc.M113.480517
1367:10.1515/HC.1997.3.4.327
1268:(inactive 2024-09-19).
837:
827:Biochemical properties
807:
783:
449:
802:
781:
447:
387:0.0±0.3 mmHg at 25°C
759:Isolation/extraction
419:are a group of five
51:improve this article
1433:(33): 23858–23867.
1012:Tetrahedron Letters
131:
1569:Anthraquinone dyes
928:www.chemspider.com
808:
784:
450:
401:Infobox references
129:
1543:materialarchiv.ch
1539:"Material-Archiv"
1505:Dyes and Pigments
1018:(11): 1199–1202.
821:hydrochloric acid
752:
751:
615:Molecular formula
498:Claudius Aelianus
409:Chemical compound
407:
406:
208:Interactive image
127:
126:
119:
101:
16:(Redirected from
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1339:
1338:
1313:(7): 1026–1034.
1298:
1292:
1291:
1285:
1277:
1245:
1239:
1238:
1197:
1191:
1190:
1142:
1136:
1135:
1133:
1132:
1122:"Laccaic acid E"
1117:
1111:
1110:
1108:
1107:
1097:"Laccaic acid D"
1092:
1086:
1085:
1083:
1082:
1072:"Laccaic acid C"
1067:
1061:
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1058:
1057:
1047:"Laccaic acid B"
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900:"Laccaic acid A"
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692:Molecular weight
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332:Chemical formula
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1404:
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1342:
1299:
1295:
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1246:
1242:
1198:
1194:
1143:
1139:
1130:
1128:
1118:
1114:
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1103:
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1089:
1080:
1078:
1068:
1064:
1055:
1053:
1043:
1039:
1004:
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941:
932:
930:
922:
921:
917:
908:
906:
896:
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881:
875:"Kermesic Acid"
871:
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817:
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417:laccainic acids
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130:Laccaic acid A
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112:
106:
103:
60:
58:
48:
36:
23:
22:
15:
12:
11:
5:
1587:
1577:
1576:
1571:
1555:
1554:
1530:
1511:(2): 179–185.
1491:
1413:
1402:www.chembk.com
1398:"LACCAIC ACID"
1389:
1360:(4): 327–330.
1340:
1293:
1260:(4): 677–685.
1240:
1192:
1157:(2): 100–107.
1137:
1112:
1087:
1062:
1037:
998:
939:
915:
890:
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863:
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858:
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611:
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603:
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568:
566:Laccaic acid E
563:
561:Laccaic acid D
558:
556:Laccaic acid C
553:
551:Laccaic acid B
548:
546:Laccaic acid A
543:
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526:
505:
502:
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453:History
451:
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395:standard state
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383:Vapor pressure
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66:"Laccaic acid"
39:
37:
30:
9:
6:
4:
3:
2:
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1436:
1432:
1428:
1424:
1417:
1403:
1399:
1393:
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1377:
1373:
1368:
1363:
1359:
1355:
1351:
1344:
1336:
1332:
1328:
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1308:
1304:
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1255:
1251:
1244:
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1232:
1228:
1224:
1220:
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1204:
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1188:
1184:
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1176:
1172:
1168:
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1152:
1148:
1141:
1127:
1123:
1116:
1102:
1098:
1091:
1077:
1073:
1066:
1052:
1048:
1041:
1033:
1029:
1025:
1021:
1017:
1013:
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1002:
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990:
985:
980:
976:
972:
967:
962:
958:
954:
950:
943:
929:
925:
919:
905:
901:
894:
880:
876:
869:
865:
857:
854:
847:Dyeing fabric
844:
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833:
824:
822:
812:
806:
803:A picture of
801:
792:
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743:
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708:495.40 g/mol
707:
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536:Laccaic acids
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495:
491:
487:
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472:
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439:kermesic acid
436:
435:carminic acid
433:, similar to
432:
431:
426:
422:
421:anthraquinone
418:
414:
413:Laccaic acids
402:
396:
390:
386:
384:
381:
380:
377:1.7±0.1 g.cm
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68: –
67:
63:
62:Find sources:
56:
52:
46:
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40:This article
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29:
28:
19:
18:Laccaic acids
1546:. Retrieved
1542:
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1470:. Retrieved
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1405:. Retrieved
1401:
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504:Derivatives
325:Properties
228:CHEBI:90186
1574:Acetamides
1563:Categories
1548:2023-03-27
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