Tos-PEG7-CH2CO2tBu linker contains a t-butyl ester and a tosyl group. The PEG spacer increases the aqueous solubility of the resulting compound. The t-butyl protected carboxyl group can be deprotected under acidic condition to form free acid, which can undergo conjugation with terminal amino group of biomolecules through amide coupling reactions. The tosyl group is a very good leaving group for nucleophilic substitution reactions. It is readily replaced by thiol groups.
Axispharm offers 3000+ PEG Linkers with high purity. Different kinds of PEG Reagents may be available by custom synthesis.
Section I. Identification of the substance
Product Name: Tos-PEG7-CH2CO2tBu
Catalog Number: AP11884
Supplier: AxisPharm, 9823 Pacific Heights Blvd, Suite F, San Diego, CA 92121
Tel: 1-858-677-9432, Email: email@example.com
Section II. Hazards identification
Classification – Not classified as a hazard
Section III. Composition and information on ingredients.
Formula Weight: 550.66
Section IV. First aid measures
Skin contact: Immediately wash skin with copious amounts of water for at least 15
minutes while removing contaminated clothing and shoes. If irritation persists, seek
2. Eye contact: Immediately wash skin with copious amounts of water for at least 15
minutes. Assure adequate flushing of the eyes by separating the eyelids with fingers. If
irritation persists, seek medical attention.
Inhalation: Remove to fresh air. In severe cases or if symptoms persist, seek
Seek medical attention.
Section V. Firefighting measures
In the event of a fire involving this material, alone or in combination with other materials,
use dry powder or carbon dioxide extinguishers. Protective clothing and self-contained
breathing apparatus should be worn.
Section VI. Accidental release measures
Personal precautions: Wear suitable personal protective equipment which performs
and meets local/state/national standards.
Respiratory precaution: Wear approved
mask/respirator Hand precaution: Wear suitable
Skin protection: Wear suitable protective
clothing Eye protection: Wear suitable eye
Methods for cleaning up: Mix with sand or similar inert absorbent material, sweep up and
keep in a tightly closed container for disposal. See section 12.
Environmental precautions: Do not allow material to enter drains or water courses.
Section VII. Handling and storage
Handling: This product should be handled only by, or under the close supervision of, those
properly qualified in the handling and use of potentially hazardous chemicals, who should
take into account the fire, health and chemical hazard data given on this sheet.
Storage: Store in closed vessels, refrigerated.
Section VIII. Exposure Controls / PPE
Engineering Controls: Use only in a chemical fume hood.
Personal protective equipment: Wear chemical-resistant gloves, safety goggles.
General hygiene measures: Wash thoroughly after handling. Wash contaminated clothing
Section IX. Physical and chemical properties
Odor: No data
Boiling Point: No data
Melting Point: No data
Flash Point: No data
Density: No data
Chemical Formula: C25H42O11S
Section X. Stability and reactivity
Conditions to avoid: Heat, flames and sparks.
Materials to avoid: Oxidizing agents.
Possible hazardous combustion products: No data available.
Section XI. Toxicological information
Section XII. Ecological information
Section XIII. Disposal consideration
Arrange disposal as special waste, by licensed disposal company, in consultation with local
waste disposal authority, in accordance with national and regional regulations.
Section XIV. Transportation information
Non-hazardous for air and ground transportation.
Section XV. Regulatory information
Indication of Danger: No data.
Risk Statement: No data.
Safety Statement: In case of contact with eyes, rinse immediately with plenty of water and
seek medical advice. Wear suitable gloves and eye/face protection.
Section XVI. Other information
This SDS is correct to the best of our knowledge and belief at the date of its publication but
does not purport to be all inclusive and shall be used only as a guide. AxisPharm shall not
be held liable for any loss, injury or damage which may result from its use. This product is
for research and development use only.