SHELLAC

SHELLAC
PRODUCT IDENTIFICATION
CAS NO.
FORMULA
MOL WT.
H.S. CODE
SYNONYMS
CLASSIFICATION
PHYSICAL AND CHEMICAL PROPERTIES
PHYSICAL STATE
FLASH POINT
BOILING POINT
SPECIFIC GRAVITY 25°C
GENERAL DESCRIPTION & APPLICATIONS
Shellac is a resin secreted by the female lac bug, on trees in the forests of China. Shellac is processed and sold as dry flakes, which are dissolved in denatured alcohol to make liquid shellac, which is used as a brush-on colorant, food glaze and wood finish. Shellac functions as a tough all-natural primer, sanding sealant, tannin-blocker, odor-blocker, stain, and high-gloss varnish. Shellac was once used in electrical applications as it possesses good insulation qualities and it seals out moisture. Shellac is often the only historically-appropriate finish for early 20th-century hardwood floors, and wooden wall and ceiling paneling. Shellac continues to be a popular candy glaze for pill shaped sweets such as Skittles. Shellac is a natural polymer and is chemically similar to synthetic polymers, and thus can be considered a natural form of plastic. It can be turned into a moulding compound when mixed with wood flour and moulded under heat and pressure methods, so it can also be classified as thermoplastic. Shellac is soluble in alkaline solutions such as ammonia, sodium borate, sodium carbonate, and sodium hydroxide, and also in various organic solvents. When dissolved in alcohol blends containing ethanol and methanol, shellac yields a coating of superior durability and hardness. Upon mild hydrolysis shellac gives a complex mix of aliphatic and alicyclic hydroxy acids and their polymers that varies in exact composition depending upon the source of the shellac and the season of collection. The major component of the aliphatic component is aleuritic acid, whereas the main alicyclic component is shellolic acid.
SALES SPECIFICATION
Appearance
Moisture				2.0% max
Heat-hardening time(170+-0.5℃), min				3.0 min
Waxiness, %				5.5 max
Color Index				18 max
Acid Value (mgKOH/g)				73 max
Insoluble matter %				0.4 max
Insoluble substance in alcohol soluble				1.0% max
Iodine value (g/100g)				20 max
TRANSPORTATION
PACKING	In wood box of 25kgs net each.
HAZARD CLASS	N/A
UN NO.	N/A
REMARK	The above information is believed to be accurate and presents the best explanation currently available to us. We assume no liability resulting from above content. The technical standards are formulated and revised by customers’ requirement and us, if there are any changes, the latest specification will be executed and confirmed in the contract.