HRK Supply L-Cysteine hydrochloride anhydrous Powder

CAS:3458-72-8

MF:C6H8O7.3H3N

MW:243.21

EINECS:222-394-5

Specification: 99% min L-Cysteine hydrochloride anhydrous Powder

Sample:L-Cysteine hydrochloride anhydrous Powder

Packaging:1kg/bag, 25kg/drum

Brand: Raw Materials

Appearance:white

Storage: Cool Dry Place

Shelf Life: 2 Years

Test Method: HPLC

1. Widely used in cosmetics, medicine, food and other industries

2. Used in biochemical research. Determination of calcium and magnesium in iron and steel raw materials. Determination of reducing agent of haemolysin. Growth culture and counting of anaerobic bacteria

3.Used in biochemical research. Determination of calcium and magnesium in iron and steel raw materials. Determination of reducing agent of haemolysin. Used in the treatment of acrylonitrile and aromatic poisoning, prevention of radioactive damage, treatment of bronchitis and phlegm. It is also used in cosmetics to prevent aging and as food additive to promote fermentation and keep fresh flavour.

4. Used as analytical reagent, such as masking agent, used for the determination of calcium and magnesium. It can be used as reducing agent for biochemical research, such as haemolysin determination. Also used for anaerobic bacteria culture

Uses of L-Cysteine hydrochloride anhydrous.

Used in the treatment of radioactive drug poisoning, heavy metal poisoning, toxic hepatitis, serum sickness, and can prevent hepatic necrosis. Used as a component in perm essence, sunscreen, hair growth perfume and hair care essence of cosmetics; used as a food additive to prevent the oxidation and discolouration of vitamin C; used in bread to promote the formation of cereal proteins and fermentation, out of the mould and so on.

making method of Bulk L-Cysteine hydrochloride anhydrous powder.

Hydrolysis of hair with hydrochloric acid, distillation under reduced pressure, distillation of hydrochloric acid after decolourisation, filtration, take the filtrate with ammonia and neutralisation to get the crude crystals of L-cystine, and then dissolved in ammonia and neutralisation, recrystallisation, hydrochloric acid and electrolytic reductions, concentration, cooling, crystallisation, drying system.

Product Methods of L-Cysteine hydrochloride anhydrous.

Hydrolysis-Electrolysis Method

Take pig hair, hair as raw material by hydrolysis, adjust the isoelectric point of cystine separation of cystine, and then electrolysis reduction of cystine, the production of cysteine. Hydrolysis to separate out cystine pig hair, hair [HCl, 117 ℃, 7h] → [acid hydrolysis] hydrolysate [NaOH, pH 4.8] → [neutralisation] L-cystine (crude) electrolytic reduction in two separate pools, a pool filled with 1 mol / L HCl inserted into the ink stick, connected to the power source of the positive electrode, this pool for the anode, the other pool is filled with hydrochloric acid solution of cystine (cystine: concentration) HCl:water=1:1:4), inserted into the lead plate, connected to the negative pole of the power supply, this pool is the cathode. Add a salt bridge between the two pools to connect.

Turn on the power to adjust the current 5A, electrolysis, about 6-7h electrolysis is completed. Take the electrolyte a little drop of pyridine, no turbidity indicates that the electrolysis is complete.L-cysteine [HCl] → [electrolysis reduction] L-cysteine hydrochloride [decolourisation, concentration, crystallisation] → L-cysteine hydrochloride crystallisation decolourisation, concentration, crystallisation after the completion of electrolysis, cut off the power supply, according to the amount of feed to add 10g / L (1%) of activated carbon, heated to 70 ° C, keep warm for half an hour. Filter the filtrate.

And will be concentrated under reduced pressure until there are crystals, stirring to make the crystals completely precipitated, filtered to take the crystals, washed with 95% ethanol, at 60 ℃ below the vacuum drying, that is, to obtain the L-cysteine hydrochloride without water of crystallisation.