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Amino acids and derivatives

(±)-Penicillamine

Also known as DL-Penicillamine, (+-)-Penicillamine, Valine, 3-mercapto-

CAS 52-66-4Formula C5H11NO2SMolar mass 149.22 g/molEC 200-147-2
GHS signal word: Warning. Pictograms: Harmful or irritant 11 suppliers listed
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(±)-Penicillamine chemical structure, C5H11NO2S, CAS 52-66-4
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
52-66-4
Formula
C5H11NO2S
Molar mass
149.22 g/mol
EC number
200-147-2
HS code
293090
Category
Amino acids and derivatives

What is (±)-Penicillamine?

Plain description, key identifiers and synonyms

Penicillamine is an alpha-amino acid having the structure of valine substituted at the beta position with a sulfanyl group. It is a thiol and a non-proteinogenic alpha-amino acid.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
2-amino-3-methyl-3-sulfanylbutanoic acid
CAS number
52-66-4 CAS number cross-checkedOther or deprecated CAS: 1113-41-3, 25526-04-9, 52-67-5
EC number
200-147-2
Molecular formula
C5H11NO2S
UNII
2XOP7Y1H98
MDL number
MFCD00004856
InChIKey
VVNCNSJFMMFHPL-UHFFFAOYSA-N
InChI
InChI=1S/C5H11NO2S/c1-5(2,9)3(6)4(7)8/h3,9H,6H2,1-2H3,(H,7,8)
SMILES (canonical and isomeric)
CC(C)(C(C(=O)O)N)S

Synonyms

  • DL-Penicillamine
  • (+-)-Penicillamine
  • Valine, 3-mercapto-
  • 2-Amino-3-mercapto-3-methylbutanoic acid
  • 3-Sulfanylvaline
  • DL-beta-Mercaptovaline
  • beta-Mercaptovaline
  • 2-amino-3-methyl-3-sulfanylbutanoic acid
  • 3,3-Dimethyl-DL-cysteine
  • 2-Amino-3-mercapto-3-methylbutyric acid
  • 3-Mercaptovaline
  • (+/-)-penicillamine
  • beta-Thiovaline
  • D-Penicyllamine
  • DL-Valine, 3-mercapto-
  • 2-amino-3-methyl-3-sulfanyl-butanoic acid
  • dl-beta,beta-Dimethylcysteine
  • DL-DMC
  • Penicillamine, (+/-)-
  • D-Mercaptovaline
  • 3,3-Dimethyl-D-cysteine
  • Penicillamin
  • D-Penicilamine
  • D-Penamine
  • d(-)-penicillamine
Show all 38 synonyms
  • Cysteine, 3,3-dimethyl-
  • Penicillamina
  • Valine, 3-mercapto-, DL-
  • valine, 3-mercapto
  • Penicilamina
  • L-beta,beta-Dimethylcysteine
  • H-beta,beta-Dimethyl-Cys-OH, H-beta-Mercapto-Val-OH
  • Penicilllamine
  • 3-Thio-D-valine
  • DL-b-Mercaptovaline
  • 3-Sulfanylvaline #
  • 3-Mercapto-DL-valine
  • beta-Mercapto-DL -valine

Physical and chemical properties

Measured values and descriptors computed from the structure

Physical and chemical properties

Measured values, check the supplier specification for your grade

No measured properties are recorded for this substance yet. Ask suppliers for a technical data sheet.

Values vary by grade. Ask suppliers for the COA or TDS of the batch you buy.

Computed descriptors

Calculated from the structure, useful for screening and formulation

Molecular weight
149.22 g/molcalc.
Exact mass
149.0511 Dacalc.
LogP (octanol/water)
0.11calc.
Topological polar surface area
63.32 Ųcalc.
Hydrogen bond donors
3calc.
Hydrogen bond acceptors
3calc.
Rotatable bonds
2calc.
Heavy atoms
9calc.
Rings
0calc.
Aromatic rings
0calc.
Fraction sp3 carbons
0.8calc.
Formal charge
0calc.
Stereocentres
1calc.
Lipinski rule of five
Passes (0 violations)calc.

Calculated for screening. Confirm critical figures with the supplier.

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Warning
GHS07: Harmful or irritant
Harmful or irritant

Hazard statements

  • H302Harmful if swallowed.
  • H315Causes skin irritation.
  • H319Causes serious eye irritation.
  • H335May cause respiratory irritation.
Precautionary statements (19)
  • P261Avoid breathing dust, fume, gas, mist, vapours or spray.
  • P264Wash skin thoroughly after handling.
  • P264 + P265Wash skin thoroughly after handling. Do not touch eyes.
  • P270Do not eat, drink or smoke when using this product.
  • P271Use only outdoors or in a well-ventilated area.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P301 + P317If swallowed: Get medical help.
  • P302 + P352If on skin: Wash with plenty of water.
  • P304 + P340If inhaled: Remove person to fresh air and keep comfortable for breathing.
  • P305 + P351 + P338If in eyes: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
  • P319Get medical help if you feel unwell.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P330Rinse mouth.
  • P332 + P317If skin irritation occurs: Get medical help.
  • P337 + P317If eye irritation persists: Get medical help.
  • P362 + P364Take off contaminated clothing. And wash it before reuse.
  • P403 + P233Store in a well-ventilated place. Keep container tightly closed.
  • P405Store locked up.
  • P501Dispose of contents and container in accordance with local regulations.

GHS classification summary, not a safety data sheet (SDS). Classifications can differ by supplier, grade and concentration. Always check the supplier's SDS.

Full safety data and first aid

(±)-Penicillamine suppliers

Sponsored listings first, then the documented ranking: membership, verification, replies, completeness, freshness and ratings

All 11 suppliers
11 of 11 offers

Suppliers marked Unclaimed profile have not claimed their profile yet. They are not verified by CompoundList, their offers are price on request and details may have changed, so please confirm them with the supplier. Company representatives can claim a profile with a business email on the company's own website domain. Our team verifies each claim and sends the result by email.

Where suppliers are based

11 suppliers in 5 countries

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(±)-Penicillamine price

Indicative price range per kg from live supplier offers

No published prices right now

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Uses and applications

What the substance is used for, by industry and function

Applications are not documented for this substance yet. Suppliers often describe uses on their product pages, linked in the suppliers list above.

Regulatory status

Inventories, regulations and trade controls that list this substance

No regulatory list memberships are recorded for this substance yet. Always check the rules of the importing and exporting country before trade.

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code (±)-Penicillamine is traded under.

HS 2930.90Indicative HS code

Organo-sulphur compounds, other

World exports in 2024
$5.83B
+0.1% vs 2023, imports $5.93B
2019 to 2024
Top exporters
  1. China40.7%
  2. United States10.9%
  3. Japan9.3%
Top importers
  1. United States13.3%
  2. Brazil12.6%
  3. China6.6%
Reported customs values in USD, not prices.Full trade data

The HS code shown for (±)-Penicillamine is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about (±)-Penicillamine, based on the data on this page

What is (±)-Penicillamine?

Penicillamine is an alpha-amino acid having the structure of valine substituted at the beta position with a sulfanyl group. It is a thiol and a non-proteinogenic alpha-amino acid.

What is the CAS number of (±)-Penicillamine?

The CAS registry number of (±)-Penicillamine is 52-66-4. Other or deprecated CAS numbers: 1113-41-3, 25526-04-9, 52-67-5.

What is the molecular formula and weight of (±)-Penicillamine?

The molecular formula of (±)-Penicillamine is C5H11NO2S and its molar mass is 149.22 g/mol.

Is (±)-Penicillamine hazardous?

(±)-Penicillamine carries the GHS signal word "Warning". Main hazards: harmful if swallowed, causes skin irritation, causes serious eye irritation. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of (±)-Penicillamine?

(±)-Penicillamine is usually classified under HS code 293090 (Organo-sulphur compounds, other). This is indicative, confirm it with your customs broker before shipping.

Where can I buy (±)-Penicillamine?

CompoundList lists 11 suppliers of (±)-Penicillamine in China, United States, Canada, Czech Republic and 1 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

What is the price of (±)-Penicillamine?

Suppliers quote (±)-Penicillamine on request because prices depend on grade, purity, quantity and destination. A free request on CompoundList gets you several quotes to compare.

Guides for buyers

Practical guides that help when you source, ship or handle (±)-Penicillamine

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Data last updated 7 Oct 2026. Details may have changed, please confirm them with the supplier. Report an error on this page
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