Chemical Safety Data Sheet MSDS / SDS
L-Homocystine
Revision Date:2026-05-31Revision Number:1
Product identifier
- Product name: L-Homocystine
- CBnumber: CB5155903
- CAS: 626-72-2
- EINECS Number: 210-962-5
- Synonyms: L-Homocystine,(2S,2'S)-4,4'-disulfanediylbis(2-aminobutanoic acid)
Relevant identified uses of the substance or mixture and uses advised against
- Relevant identified uses: For R&D use only. Not for medicinal, household or other use.
- Uses advised against: none
Company Identification
- Company: Chemicalbook
- Address: Building 1, Huihuang International, Shangdi 10th Street, Haidian District, Beijing
- Telephone: 010-86108875
GHS Label elements, including precautionary statements
-
Symbol(GHS)
- Signal wordWarning
P312 Call a POISON CENTER or doctor/physician if you feel unwell.
P403+P233 Store in a well-ventilated place. Keep container tightly closed.
P405 Store locked up.
P501 Dispose of contents/container to..…
P304+P340 IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing.
P271 Use only outdoors or in a well-ventilated area.
P261 Avoid breathing dust/fume/gas/mist/vapours/spray.
P337+P313 IF eye irritation persists: Get medical advice/attention.
P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.
P362 Take off contaminated clothing and wash before reuse.
P332+P313 IF SKIN irritation occurs: Get medical advice/attention.
P321 Specific treatment (see … on this label).
P302+P352 IF ON SKIN: wash with plenty of soap and water.
P280 Wear protective gloves/protective clothing/eye protection/face protection.
P264 Wash skin thouroughly after handling.
Hazard statements
H335 May cause respiratory irritation
H319 Causes serious eye irritation
H315 Causes skin irritation
Substance
- Product name: L-Homocystine
- Synonyms: L-Homocystine,(2S,2'S)-4,4'-disulfanediylbis(2-aminobutanoic acid)
- CAS: 626-72-2
- EC number: 210-962-5
- MF: C8H16N2O4S2
- MW: 268.35
4.1 Description of first-aid measures
No data available
4.2 Most important symptoms and effects, both acute and delayed
The most important known symptoms and effects are described in the labelling (see section 2) and/or in section 11
4.3 Indication of any immediate medical attention and special treatment needed
No data available
4.4 Notes to physician
No data available
5.1 Extinguishing media
No data available
5.2 Special hazards arising from the substance or mixture
Carbon oxides
Nitrogen oxides (NOx)
Sulfur oxides
Combustible.
Nitrogen oxides (NOx)
Sulfur oxides
Combustible.
5.3 Advice for firefighters
No data available
6.1 Personal precautions, protective equipment and emergency procedures
For personal protection see section 8.
6.2 Environmental precautions
No data available
6.3 Methods and materials for containment and cleaning up
No data available
6.4 Reference to other sections
For disposal see section 13.
7.1 Precautions for safe handling
For precautions see section 2.2.
7.2 Conditions for safe storage, including any incompatibilities
No data available
8.1 Control parameters
Ingredients with workplace control parametersContains no substances with occupational exposure limit values.
8.2 Exposure controls
No data available
Information on basic physicochemical properties
- a) Physical statepowder
- b) Colorwhite
- c) OdorNo data available
- d) Melting point/freezing pointMelting point/range: 281 - 284 °C
- e) Initial boiling point and boiling range507.6±50.0 °C(Predicted)
- f) Flammability (solid, gas)No data available
- g) Upper/lower flammability or explosive limitsNo data available
- h) Flash pointNo data available
- i) Autoignition temperatureNo data available
- j) Decomposition temperatureNo data available
- k) pHNo data available
- l) ViscosityViscosity, kinematic: No data available
Viscosity, dynamic: No data available - m) Water solubilityNo data available
- n) Partition coefficient n-octanol/waterNo data available
- o) Vapor pressureNo data available
- p) Density1.443±0.06 g/cm3(Predicted)
- Relative density1.443±0.06 g/cm3(Predicted)
- q) Relative vapor densityNo data available
- r) Particle characteristicsNo data available
- s) Explosive propertiesNo data available
- t) Oxidizing propertiesNo data available
- SolubilityH2O : 5 mg/mL (18.63 mM; ultrasonic and adjust pH to 3 with H2O)DMSO : 1 mg/mL (3.73 mM; ultrasonic and adjust pH to 5 with HCl)
9.2 Other safety information
No data available
10.1 Chemical stability
No data available
10.2 Possibility of hazardous reactions
No data available
10.3 Conditions to avoid
No data available
10.4 Incompatible materials
Strong oxidizing agents
10.5 Hazardous decomposition products
In the event of fire: see section 5
11.1 Information on toxicological effects
Acute toxicityOral: No data available
Inhalation: No data available
Dermal: No data available
Skin corrosion/irritation
Inhalation: No data available
Dermal: No data available
Remarks: No data available
Serious eye damage/eye irritation
Remarks: No data available
Respiratory or skin sensitization
Classified based on available data. For more details, see section 2
Germ cell mutagenicity
Classified based on available data. For more details, see section 2
Carcinogenicity
Classified based on available data. For more details, see section 2
Reproductive toxicity
Classified based on available data. For more details, see section 2
Specific target organ toxicity - single exposure
Classified based on available data. For more details, see section 2
Specific target organ toxicity - repeated exposure
Classified based on available data. For more details, see section 2
Aspiration hazard
Classified based on available data. For more details, see section 2
11.2 Additional Information
Classified based on available data. For more details, see section 2
12.1 Toxicity
No data available
12.2 Persistence and degradability
No data available
12.3 Bioaccumulative potential
No data available
12.4 Mobility in soil
No data available
12.5 Results of PBT and vPvB assessment
PBT/vPvB assessment not available as chemical safety assessment not required/not conducted
12.6 Endocrine disrupting properties
No data available
12.7 Other adverse effects
No data available
14.1 UN number
ADR/RID: -
IMDG: -
IATA-DGR: -
IMDG: -
IATA-DGR: -
14.2 UN proper shipping name
ADR/RID: Not dangerous goods
IMDG: Not dangerous goods
IATA-DGR: Not dangerous goods
IMDG: Not dangerous goods
IATA-DGR: Not dangerous goods
14.3 Transport hazard class(es)
ADR/RID: -
IMDG: -
IATA-DGR: -
IMDG: -
IATA-DGR: -
14.4 Packaging group
ADR/RID: -
IMDG: -
IATA-DGR: -
IMDG: -
IATA-DGR: -
14.5 Environmental hazards
ADR/RID: no
IMDG Marine pollutant: no
IATA-DGR: no
IMDG Marine pollutant: no
IATA-DGR: no
14.6 Special precautions for user
14.7 Incompatible materials
Strong oxidizing agents
Further information: Not classified as dangerous in the meaning of transport regulations.
Further information: Not classified as dangerous in the meaning of transport regulations.
15.1 Safety, health and environmental regulations/legislation specific for the substance or mixture
National regulatory information
Other regulations
Please pay attention on the waste treatment should also comply with local regulations requirement.
Other regulations
Please pay attention on the waste treatment should also comply with local regulations requirement.
Abbreviations and acronyms
CAS: Chemical Abstracts Service
TWA: Time-Weighted Average
STEL: Short-Term Exposure Limit
LD50: Lethal Dose 50%
LC50: Lethal Concentration 50%
EC50: Effective Concentration 50%
PEL: Permissible Exposure Limit
TLV: Threshold Limit Value
IMDG: International Maritime Dangerous Goods Code
IATA: International Air Transport Association
ADR: European Agreement concerning the International Carriage of Dangerous Goods by Road
DOT: US Department of Transportation
NFPA: National Fire Protection Association
NIOSH: National Institute for Occupational Safety and Health
OSHA: Occupational Safety and Health Administration
TWA: Time-Weighted Average
STEL: Short-Term Exposure Limit
LD50: Lethal Dose 50%
LC50: Lethal Concentration 50%
EC50: Effective Concentration 50%
PEL: Permissible Exposure Limit
TLV: Threshold Limit Value
IMDG: International Maritime Dangerous Goods Code
IATA: International Air Transport Association
ADR: European Agreement concerning the International Carriage of Dangerous Goods by Road
DOT: US Department of Transportation
NFPA: National Fire Protection Association
NIOSH: National Institute for Occupational Safety and Health
OSHA: Occupational Safety and Health Administration
Disclaimer:
The information in this MSDS is only applicable to the specified product, unless otherwise specified, it is not applicable to the mixture of this product and other substances. This MSDS only provides information on the safety of the product for those who have received the appropriate professional training for the user of the product. Users of this MSDS must make independent judgments on the applicability of this SDS. The authors of this MSDS will not be held responsible for any harm caused by the use of this MSDS.