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DL-Cysteine

DL-Cysteine structure

CAS No:
3374-22-9
Formula:
C3H7NO2S
Chemical Name:
DL-Cysteine
Synonyms:
(RS)-2-Amino-3-mercapto-propansαure;Cysteine, DL-;DL-2-amino-3-mercaptopropanoicacid;DL-2-amino-3-mercaptopropionicacid;Carbocistein Impurity 2;DL-CYSTEINE FREE BASE;DL-2-Amino-3-mercaptopropionicacid~H-DL-Cys-OH;(+/-)-2-AMINO-3-MERCAPTOPROPIONIC ACID
Categories:
Cosmetic Ingredient > Antistatic

Description

white solid

Cysteine is a sulfur-containing amino acid that is propanoic acid with an amino group at position 2 and a sulfanyl group at position 3. It has a role as a fundamental metabolite. It is an alpha-amino acid, a polar amino acid and a sulfur-containing amino acid. It contains a sulfanylmethyl group. It is a conjugate base of a cysteinium. It is a conjugate acid of a cysteinate(1-). It is a tautomer of a cysteine zwitterion.

DL-Cysteine Basic Attributes

Molecular Weight：

121.16

Exact Mass：

121.16

BRN：

1721406

EC Number：

222-160-2

NSC Number：

647530|63864

DSSTox ID：

DTXSID5046988

Color/Form：

White to off-white

HScode：

29309013

Characteristics

PSA：

64.3

XLogP3：

-2.5

Appearance：

White to off-white Powder

Density：

1.197 (estimate)

Melting Point：

225 °C (dec.) (lit.)

Boiling Point：

293.9±35.0 °C(Predicted)

Flash Point：

131.5±25.9 °C

Refractive Index：

1.5130 (estimate)

Water Solubility：

Soluble in water (partly), 1 N HCl (25 mg/ml), ethanol, and acetic acid. Insoluble in acetone.

Storage Conditions：

Keep container tightly closed in a dry and well-ventilated place. Store under inert gas. Air sensitive. Storage class (TRGS 510): Non Combustible Solids.

Vapor Pressure：

6.73X10-7 mm Hg at 25 deg C (est)

Specific rotation：

Specific optical rotation: +6.5 deg at 25 °C/D (5 N HCl); +13.0 deg at 25 °C/D (glacial acetic acid)

PKA：

2.07±0.10(Predicted)

Critical Temperature & Pressure：

Keep in dark place,Inert atmosphere,Room temperature

Safety Information

Hazard category：

8, 6.1

Transport codes：

UN 2923 6.1(8) / PGIII

wgk germany：

hazard class code：

Xn,Xi,C

safety instructions：

26-36-37/39-45-36/37/39

RTECS Number：

HA1595000

Marks：

Xn,Xi,C

Stability/Shelf Life：

Stable. Incompatible with strong oxidizing agents,

Precautionary statement(s)：

P280-P301 + P312 + P330-P303 + P361 + P353-P304 + P340 + P310-P305 + P351 + P338

Hazard Statements：

20/21/22-36/37/38-22-35

RIDADR：

UN 2923 6.1(8) / PGIII

GHS Classification：

|Warning|H302 (100%): Harmful if swallowed [Warning Acute toxicity, oral]|P264, P270, P301+P312, P330, and P501|Aggregated GHS information provided by 46 companies from 6 notifications to the ECHA C&L Inventory.

DL-Cysteine Use and Manufacturing

Methods of Manufacturing

It is obtained by using DL-cysteine hydrochloride as raw material, neutralizing with alkali, filtering, drying and refining.

Uses

Cysteine is a non-essential amino acid that can be synthesized by the human body under normal physiological conditions if a sufficient quantity of methionine is available. Cysteine is commonly used as a precursor in the food and pharmaceutical industries. Cysteine is used as a processing aid for baking, as an additive in cigarettes, as well as in the preparation of meat flavours.

DL-Cysteine is a NMDA agonist at quisqualate receptors at high concentration.

Computed Properties

Molecular Weight:121.16
XLogP3:-2.5
Hydrogen Bond Donor Count:3
Hydrogen Bond Acceptor Count:4
Rotatable Bond Count:2
Exact Mass:121.01974964
Monoisotopic Mass:121.01974964
Topological Polar Surface Area:64.3
Heavy Atom Count:7
Complexity:75.3
Undefined Atom Stereocenter Count:1
Covalently-Bonded Unit Count:1
Compound Is Canonicalized:Yes

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Guide of DL-Cysteine

Description
Basic Attributes
Characteristics
Safety Information
Use and Manufacturing
Computed Properties
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DL-Cysteine

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