1,4-Dioxa-7-thiaspiro[4.4]nonane

Modify Date: 2026-07-16 12:02:49

1,4-Dioxa-7-thiaspiro[4.4]nonane Structure
1,4-Dioxa-7-thiaspiro[4.4]nonane structure
Common Name 1,4-Dioxa-7-thiaspiro[4.4]nonane
CAS Number 176-35-2 Molecular Weight 146.20700
Density 1.24g/cm3 Boiling Point 244.7ºC at 760mmHg
Molecular Formula C6H10O2S Melting Point N/A
MSDS N/A Flash Point 101.8℃

Summary: 1,4-Dioxa-7-thiaspiro[4.4]nonane (Chinese name: 1,4-二氧-7-噻螺环壬烷, CAS number: 176-35-2), molecular formula C6H10O2S, molecular weight 146.21. For research-use only, not for medical or clinical usage.


 Names

This table lists Chinese names, IUPAC names and various aliases of this chemical substance.

Name 1,4-Dioxa-7-thiaspiro[4.4]nonane
Synonym More Synonyms

 Chemical & Physical Properties

This table shows physicochemical parameters including melting point, boiling point, density, solubility and optical rotation. Missing data is marked as N/A.

Density 1.24g/cm3
Boiling Point 244.7ºC at 760mmHg
Molecular Formula C6H10O2S
Molecular Weight 146.20700
Flash Point 101.8℃
Exact Mass 146.04000
PSA 43.76000
LogP 0.86640
Vapour Pressure 0.0468mmHg at 25°C
Index of Refraction 1.546
InChIKey RQALKBLYTUKBFV-UHFFFAOYSA-N
SMILES C1COC2(CCSC2)O1

 MSDS

This table provides MSDS information including hazard classification, first‑aid, fire‑fighting, spill handling, operation and storage instructions.

Name: 1 4-Dioxa-7-thiaspiro[4.4]nonane 95+% Material Safety Data Sheet
Synonym: Tetrahydrothiophene-3-one ethyleneketa
CAS: 176-35-2
Section 1 - Chemical Product MSDS Name:1 4-Dioxa-7-thiaspiro[4.4]nonane 95+% Material Safety Data Sheet
Synonym:Tetrahydrothiophene-3-one ethyleneketa

Section 2 - COMPOSITION, INFORMATION ON INGREDIENTS
CAS# Chemical Name content EINECS#
176-35-2 1,4-Dioxa-7-thiaspiro[4.4]nonane 95+% unlisted
Hazard Symbols: None Listed.
Risk Phrases: None Listed.

Section 3 - HAZARDS IDENTIFICATION
EMERGENCY OVERVIEW
Not available.
Potential Health Effects
Eye:
May cause eye irritation.
Skin:
May cause skin irritation. May be harmful if absorbed through the skin.
Ingestion:
May cause irritation of the digestive tract. May be harmful if swallowed.
Inhalation:
May cause respiratory tract irritation. May be harmful if inhaled.
Chronic:
Not available.

Section 4 - FIRST AID MEASURES
Eyes: Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid.
Skin:
Get medical aid. Flush skin with plenty of water for at least 15 minutes while removing contaminated clothing and shoes.
Ingestion:
Get medical aid. Wash mouth out with water.
Inhalation:
Remove from exposure and move to fresh air immediately.
Notes to Physician:
Treat symptomatically and supportively.

Section 5 - FIRE FIGHTING MEASURES
General Information:
As in any fire, wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear.
Extinguishing Media:
Use water spray, dry chemical, carbon dioxide, or chemical foam.

Section 6 - ACCIDENTAL RELEASE MEASURES
General Information: Use proper personal protective equipment as indicated in Section 8.
Spills/Leaks:
Absorb spill with inert material (e.g. vermiculite, sand or earth), then place in suitable container. Vacuum or sweep up material and place into a suitable disposal container.

Section 7 - HANDLING and STORAGE
Handling:
Avoid breathing dust, vapor, mist, or gas. Avoid contact with skin and eyes.
Storage:
Store in a cool, dry place. Store in a tightly closed container.

Section 8 - EXPOSURE CONTROLS, PERSONAL PROTECTION
Engineering Controls:
Use adequate ventilation to keep airborne concentrations low.
Exposure Limits CAS# 176-35-2: Personal Protective Equipment Eyes: Not available.
Skin:
Wear appropriate protective gloves to prevent skin exposure.
Clothing:
Wear appropriate protective clothing to prevent skin exposure.
Respirators:
Follow the OSHA respirator regulations found in 29 CFR 1910.134 or European Standard EN 149. Use a NIOSH/MSHA or European Standard EN 149 approved respirator if exposure limits are exceeded or if irritation or other symptoms are experienced.

Section 9 - PHYSICAL AND CHEMICAL PROPERTIES

Physical State: Solid or liquid
Color: Not available.
Odor: stench
pH: Not available.
Vapor Pressure: Not available.
Viscosity: Not available.
Boiling Point: Not available.
Freezing/Melting Point: Not available.
Autoignition Temperature: Not available.
Flash Point: Not available.
Explosion Limits, lower: Not available.
Explosion Limits, upper: Not available.
Decomposition Temperature:
Solubility in water:
Specific Gravity/Density:
Molecular Formula: C6H10O2S
Molecular Weight: 146

Section 10 - STABILITY AND REACTIVITY
Chemical Stability:
Not available.
Conditions to Avoid:
Incompatible materials.
Incompatibilities with Other Materials:
Oxidizing agents.
Hazardous Decomposition Products:
Carbon monoxide, oxides of sulfur, carbon dioxide.
Hazardous Polymerization: Has not been reported

Section 11 - TOXICOLOGICAL INFORMATION
RTECS#:
CAS# 176-35-2 unlisted.
LD50/LC50:
Not available.
Carcinogenicity:
1,4-Dioxa-7-thiaspiro[4.4]nonane - Not listed by ACGIH, IARC, or NTP.

Section 12 - ECOLOGICAL INFORMATION


Section 13 - DISPOSAL CONSIDERATIONS
Dispose of in a manner consistent with federal, state, and local regulations.

Section 14 - TRANSPORT INFORMATION

IATA
No information available.
IMO
No information available.
RID/ADR
No information available.

Section 15 - REGULATORY INFORMATION

European/International Regulations
European Labeling in Accordance with EC Directives
Hazard Symbols: Not available.
Risk Phrases:
Safety Phrases:
S 24/25 Avoid contact with skin and eyes.
WGK (Water Danger/Protection)
CAS# 176-35-2: No information available.
Canada
None of the chemicals in this product are listed on the DSL/NDSL list.
CAS# 176-35-2 is not listed on Canada's Ingredient Disclosure List.
US FEDERAL
TSCA
CAS# 176-35-2 is not listed on the TSCA inventory.
It is for research and development use only.


SECTION 16 - ADDITIONAL INFORMATION
N/A

 Safety Information

This table covers safety warnings, protective measures, incompatible substances and disposal guidelines for this compound.

Safety Phrases S24/25

 Synthetic Route

This table presents publicly reported synthetic routes, reaction conditions, reactants and product information of the compound.

~73%

1,4-Dioxa-7-thiaspiro[4.4]nonane Structure

1,4-Dioxa-7-thi...

CAS#:176-35-2

Learn More
Literature: Miklos, Peter; Senning, Alexander Tetrahedron, 1987 , vol. 43, # 1 p. 249 - 254

~%

1,4-Dioxa-7-thiaspiro[4.4]nonane Structure

1,4-Dioxa-7-thi...

CAS#:176-35-2

Learn More
Literature: Nagasawa, Kazuo; Umezawa, Toshiyuki; Itoh, Kei-ichi Heterocycles, 1984 , vol. 21, # 2 p. 463

 Precursor & DownStream

This table lists upstream starting materials and downstream derivative products related to this chemical.

Precursor  3

DownStream  0

 Synonyms

This table collects all English aliases, systematic names and CAS‑related synonyms of the compound.

1,4-dioxa-7-thiaspiro[4.4]nonane

 1,4-Dioxa-7-thiaspiro[4.4]nonane | FAQ

This section contains frequently‑asked‑questions about this compound, including basic parameters, properties, storage conditions and corresponding answers.

Q: What is the safety information for 1,4-Dioxa-7-thiaspiro[4.4]nonane?
A: Safety information for 1,4-Dioxa-7-thiaspiro[4.4]nonane: S24/25.
Q: What is the molecular formula of 1,4-Dioxa-7-thiaspiro[4.4]nonane?
A: Molecular formula of 1,4-Dioxa-7-thiaspiro[4.4]nonane is C6H10O2S.
Q: What is the polar surface area (PSA) of 1,4-Dioxa-7-thiaspiro[4.4]nonane?
A: Polar surface area (PSA) of 1,4-Dioxa-7-thiaspiro[4.4]nonane is 43.76000.
Q: What is the LogP of 1,4-Dioxa-7-thiaspiro[4.4]nonane?
A: LogP of 1,4-Dioxa-7-thiaspiro[4.4]nonane is 0.86640.
Q: What is the InChIKey of 1,4-Dioxa-7-thiaspiro[4.4]nonane?
A: InChIKey of 1,4-Dioxa-7-thiaspiro[4.4]nonane is RQALKBLYTUKBFV-UHFFFAOYSA-N.
Q: What is the English name of 1,4-Dioxa-7-thiaspiro[4.4]nonane?
A: The English name of 1,4-Dioxa-7-thiaspiro[4.4]nonane is 1,4-Dioxa-7-thiaspiro[4.4]nonane.
Q: What is the molecular weight of 1,4-Dioxa-7-thiaspiro[4.4]nonane?
A: Molecular weight of 1,4-Dioxa-7-thiaspiro[4.4]nonane is 146.20700.
Q: What is the CAS number of 1,4-Dioxa-7-thiaspiro[4.4]nonane?
A: CAS number of 1,4-Dioxa-7-thiaspiro[4.4]nonane is 176-35-2.
Q: What is the boiling point of 1,4-Dioxa-7-thiaspiro[4.4]nonane?
A: Boiling point of 1,4-Dioxa-7-thiaspiro[4.4]nonane is 244.7ºC at 760mmHg.
Q: What are the upstream materials of 1,4-Dioxa-7-thiaspiro[4.4]nonane?
A: Related upstream materials(CAS) of 1,4-Dioxa-7-thiaspiro[4.4]nonane: 1003-04-9;107-21-1;110431-53-3.

 1,4-Dioxa-7-thiaspiro[4.4]nonanefactory

This table lists manufacturers and suppliers of this compound, including vendor names and product supply reference information.

Shanghai Nianxing Industrial Co., Ltd
Dayang Chem (Hangzhou) Co., Ltd.
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