D-Cysteine Hydrochloride Monohydrate CAS 32443-99-5 (H-D-Cys-OH·HCl·H2O) Assay 98.5~101.0%

Short Description:

Name: D-Cysteine Hydrochloride Monohydrate

Synonyms: H-D-Cys-OH·HCl·H2O

CAS: 32443-99-5

Assay: 98.5~101.0% (on Dried Basis) 

Appearance: White Crystals or Crystalline Powder 

Amino Acids & Derivatives, High Quality

Contact: Dr. Alvin Huang

Mobile/Wechat/WhatsApp: +86-15026746401

E-Mail: alvin@ruifuchem.com


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Description:

Shanghai Ruifu Chemical Co., Ltd. is the leading supplier of D-Cysteine Hydrochloride Monohydrate (H-D-Cys-OH·HCl·H2O) (CAS: 32443-99-5) with high quality. Ruifu Chemical supplys a series of amino acids & derivatives. Our products have reached or exceeded the international specifications, such as AJI, USP, EP, JP and FCC, which are exported to many countries at home and abroad. We can provide COA, worldwide delivery, small and bulk quantities available. If you want to purchase, Please contact: alvin@ruifuchem.com

Chemical Properties:

Chemical Name D-Cysteine Hydrochloride Monohydrate  
Synonyms H-D-Cys-OH·HCl·H2O; D-Cys·HCl·H2O; H-D-Cys-OH·H2O·HCl; D-Cysteine HCl Monohydrate; H-D-Cys-OH·HCl Monohydrate; D-2-Amino-3-Mercaptopropionic Acid Hydrochloride Monohydrate
Stock Status In Stock, Production Capacity 500 Tons per Year 
CAS Number 32443-99-5 
Molecular Formula C3H7NO2S·HCl·H2O
Molecular Weight 175.63 g/mole
Melting Point 185℃(dec.)
Sensitive Hygroscopic. Moisture Sensitive
Water Solubility  Soluble in Water
Solubility  Slightly Soluble in Ethanol, With a Slight Smell of Organic Sulfide
Storage Temp.  Sealed in Dry, Store at Room Temperature
COA & MSDS Available
Classification Amino Acids & Derivatives 
Brand Ruifu Chemical

Safety Information:

Hazard Codes  Xi - Irritant
Risk Statements  36/37/38 - Irritating to eyes, respiratory system and skin.
Safety Statements                          S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36 - Wear suitable protective clothing.
WGK Germany 3
F 3-10-23
HS Code 2930901000

Specifications:

Items Inspection Standards Results
Appearance White Crystals or Crystalline Powder Conforms          
Identification Meets the Requirements  Conforms
Specific Rotation [α]20/D -6.1° to -7.8°(C=8 in 1N HCl)
-6.3°
State of Solution (Transmittance) Clear and Colorless ≥98.0% 99.0%
Chloride (Cl) 19.89~20.29% 20.2%
Sulfate (SO4) ≤0.020% <0.020%
Ammonium (NH4) ≤0.020% <0.020%
Iron (Fe) ≤10ppm <10ppm
Heavy Metals (Pb) ≤10ppm <10ppm 
Arsenic (As2O3) ≤1.0ppm <1.0ppm
Other Amino Acids Chromatographically Not Detectable  Conforms
Loss on Drying 8.50~12.0% 9.97%
Residue on Ignition (Sulfated) ≤0.10% 0.06%
Assay 98.5 to 101.0% (on Dried Basis)     99.7%
Conclusion This Product by Inspection Accords with the Standard of AJI97
Shelf Life 24 Months From Manufacture Date if Stored Properly 
Main Uses Amino Acids & Derivatives; Pharmaceutical Intermediates

32443-99-5 AJI 97 Test Method:

D-Cysteine Hydrochloride Monohydrate (H-D-Cys-OH·HCl·H2O) (CAS: 32443-99-5) AJI 97 Test Method
D-Cysteine Hydrochloride Monohydrate, when dried, containes not less than 98.5 percent and not more than 101.0 percent of D-Cysteine Hydrochloride (C3H7NO2S·HCl).
Solubility (H2O, g/100g): about 67 (25℃)
Identification: (1) To 5ml of a solution of D-Cysteine Hydrochloride Monohydrate (1→1000) add 0.5ml of pyridine and 1ml of 1% ninhydrin solution and heat for 3 minutes; a purple or purplish brown color is produced.
(2) To 5ml of a solution of D-Cysteine Hydrochloride Monohydrate (1→1000) and 2ml of 10% sodium hydroxide solution and two drops of 5% sodium nitroferricyanide solution; a red-purple color is produced.
(3) Take the small amounts of the test sample on the copper wire. Burn in the gas flame, then a green color is produced (Beilstein reaction).
Specific Rotation [α]20/D: Dried sample, C=8, 1mol/L HCl
State of Solution (Transmittance): 1.0g in 10ml of H2O, spectrophotometer, 430nm, 10mm cell thickness.
Chloride (Cl): 350mg, B-2
Ammonium (NH4): A-1
Sulfate (SO4): 1.2g, (1), ref: 0.50ml of 0.005mol/L H2SO4
Heavy Metals (Pb): 2.0g, (1), pH=7, ref: 2.0ml of Pb Std. (0.01mg/ml)
Arsenic (As2O3): 2.0g, (1), ref: 2.0ml of As2O3 Std.
Other Amino Acids: Test Sample: 10μg, A-1-a
Loss on Drying: In vacuum, P2O5, at room temperature for 20 hous.
Residue on Ignition (Sulfated): AJI Test 13
Assay: Dried sample, 250ml, 0.05mol/L I2 1ml=15.762mg C3H7NO2S·HCl
Other Amino Acids: Dissolve 200mg of the sample in 2% N-ethyl-maleimide aqueous solution to make 100ml and allow to stand for 30 minutes and then proceed as directed for procedure under AJI TEST 9. 

Package & Storage:

Package: Fluorinated Bottle, 25kg/bag, 25kg/Cardboard Drum, or according to customer's requirement.

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Storage Condition: Store in sealed containers at cool, dry and ventilated warehouse away from incompatible substances. Protect from light and moisture.

Advantages:

Sufficient Capacity: Sufficient facilities and technicians

Professional Service: One stop purchasing service

OEM Package: Custom package and label available

Fast Delivery: If within stock, three days delivery guaranteed

Stable Supply: Maintain reasonable stock    

Technical Support: Technology solution available

Custom Synthesis Service: Ranged from grams to kilos

High Quality: Established a complete quality assurance system

FAQ:

How to Purchase? Please contact Dr. Alvin Huang: sales@ruifuchem.com or alvin@ruifuchem.com 

15 Years Experience? We have more than 15 years of experience in the manufacture and export of a wide range of high quality pharmaceutical intermediates or fine chemicals.

Main Markets? Sell to domestic market, North America, Europe, India, Korea, Japanese, Australia, etc.

Advantages? Superior quality, affordable price, professional services and technical support, fast delivery.

Quality AssuranceStrict quality control system. Professional equipment for analysis include NMR, LC-MS, GC, HPLC, ICP-MS, UV, IR, OR, K.F, ROI, LOD, MP, Clarity, Solubility, Microbial limit test, etc.

SamplesMost products provide free samples for quality evaluation, shipping cost should be paid by customers.

Factory AuditFactory audit welcome. Please make an appointment in advance.

MOQ? No MOQ. Small order is acceptable.

Delivery Time? If within stock, three days delivery guaranteed.

TransportationBy Express (FedEx, DHL), by Air, by Sea.

Documents? After sales service: COA, MOA, ROS, MSDS, etc. can be provided.

Custom SynthesisCan provide custom synthesis services to best fit your research needs.

Payment TermsProforma invoice will be sent first after confirmation of order, enclosed our bank information. Payment by T/T (Telex Transfer), PayPal, Western Union, etc. 

Application:

D-Cysteine Hydrochloride Monohydrate (H-D-Cys-OH·HCl·H2O) (CAS: 32443-99-5), Amino Acids and Derivatives; NMDA Agonists; Peptide Synthesis; Pharmaceutical Intermediates; Food and feed additives; Nutritional additive. 

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