CAS 33204-76-1|2,2,4,6,6,8-hexamethyl-4,8-diphenyl-1,3,5,7,2,4,6,8-tetraoxatetra silocane

Introduction：Basic information about CAS 33204-76-1|2,2,4,6,6,8-hexamethyl-4,8-diphenyl-1,3,5,7,2,4,6,8-tetraoxatetra silocane, including its chemical name, molecular formula, synonyms, physicochemical properties, and safety information, etc.

Table of Contents

1. Names
2. Chemical & Physical Properties
3. Toxicological Information
CHEMICAL IDENTIFICATION
HEALTH HAZARD DATA
ACUTE TOXICITY DATA
4. Synonyms

Common Name	2,2,4,6,6,8-hexamethyl-4,8-diphenyl-1,3,5,7,2,4,6,8-tetraoxatetra silocane
CAS Number	33204-76-1	Molecular Weight	420.75500
Density	1.06 g/cm3	Boiling Point	353.9ºC at 760 mmHg
Molecular Formula	C₁₈H₂₈O₄Si₄	Melting Point	41ºC
MSDS	/	Flash Point	146ºC

Names

Name	2,2,4,6,6,8-hexamethyl-4,8-diphenyl-1,3,5,7,2,4,6,8-tetraoxatetra silocane
Synonym	More Synonyms

Chemical & Physical Properties

Density	1.06 g/cm3
Boiling Point	353.9ºC at 760 mmHg
Melting Point	41ºC
Molecular Formula	C₁₈H₂₈O₄Si₄
Molecular Weight	420.75500
Flash Point	146ºC
Exact Mass	420.10600
PSA	36.92000
LogP	3.42840
Index of Refraction	1.513
InChIKey	ZTQZMPQJXABFNC-UHFFFAOYSA-N
SMILES	C[Si]1(O[Si](O[Si](O[Si](O1)(C)C2=CC=CC=C2)(C)C)(C)C3=CC=CC=C3)C

Toxicological Information

CHEMICAL IDENTIFICATION

RTECS NUMBER :: GZ4390000

CHEMICAL NAME :: Cyclotetrasiloxane, 2,6-diphenylhexamethyl-, Z-

CAS REGISTRY NUMBER :: 33204-76-1

LAST UPDATED :: 199710

DATA ITEMS CITED :: 18

MOLECULAR FORMULA :: C18-H28-O4-Si4

MOLECULAR WEIGHT :: 420.82

WISWESSER LINE NOTATION :: T8-SI-O-SI-O-SI-O-SI-OJ A1 A1 C1 CR& E1 E1 F1 FR

HEALTH HAZARD DATA

ACUTE TOXICITY DATA

TYPE OF TEST :: LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Rodent - rat

DOSE/DURATION :: >5 gm/kg

TOXIC EFFECTS :: Details of toxic effects not reported other than lethal dose value

REFERENCE :: APTSAI Acta Pharmacologica et Toxicologica, Supplementun. (Munksgaard International Pub., POB 2148, DK-1016 Copenhagen K, Denmark) No.1- 1947- Volume(issue)/page/year: 36(3),93,1975

TYPE OF TEST :: LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Rodent - mouse

DOSE/DURATION :: >5 gm/kg

TOXIC EFFECTS :: Details of toxic effects not reported other than lethal dose value

REFERENCE :: APTSAI Acta Pharmacologica et Toxicologica, Supplementun. (Munksgaard International Pub., POB 2148, DK-1016 Copenhagen K, Denmark) No.1- 1947- Volume(issue)/page/year: 36(3),93,1975 ** REPRODUCTIVE DATA **

TYPE OF TEST :: TDLo - Lowest published toxic dose

ROUTE OF EXPOSURE :: Oral

DOSE :: 300 ug/kg

SEX/DURATION :: female 3 day(s) pre-mating

TOXIC EFFECTS :: Reproductive - Maternal Effects - uterus, cervix, vagina

REFERENCE :: TXAPA9 Toxicology and Applied Pharmacology. (Academic Press, Inc., 1 E. First St., Duluth, MN 55802) V.1- 1959- Volume(issue)/page/year: 21,68,1972

TYPE OF TEST :: TDLo - Lowest published toxic dose

ROUTE OF EXPOSURE :: Oral

DOSE :: 1 mg/kg

SEX/DURATION :: female 1 day(s) after conception

TOXIC EFFECTS :: Reproductive - Fertility - female fertility index (e.g. # females pregnant per # sperm positive females; # females pregnant per # females mated)

REFERENCE :: BIREBV Biology of Reproduction. (Soc. for the Study of Reproduction, 309 W. Clark St., Champaign, IL 61820) V.1- 1969- Volume(issue)/page/year: 7,260,1972

TYPE OF TEST :: TDLo - Lowest published toxic dose

ROUTE OF EXPOSURE :: Oral

DOSE :: 3 mg/kg

SEX/DURATION :: female 1 day(s) after conception

TOXIC EFFECTS :: Reproductive - Fertility - other measures of fertility

REFERENCE :: BIREBV Biology of Reproduction. (Soc. for the Study of Reproduction, 309 W. Clark St., Champaign, IL 61820) V.1- 1969- Volume(issue)/page/year: 7,260,1972

TYPE OF TEST :: TDLo - Lowest published toxic dose

ROUTE OF EXPOSURE :: Oral

DOSE :: 10 mg/kg

SEX/DURATION :: female 5 day(s) after conception

TOXIC EFFECTS :: Reproductive - Fertility - post-implantation mortality (e.g. dead and/or resorbed implants per total number of implants)

REFERENCE :: BIREBV Biology of Reproduction. (Soc. for the Study of Reproduction, 309 W. Clark St., Champaign, IL 61820) V.1- 1969- Volume(issue)/page/year: 7,260,1972

TYPE OF TEST :: TDLo - Lowest published toxic dose

ROUTE OF EXPOSURE :: Oral

DOSE :: 7 mg/kg

SEX/DURATION :: male 7 day(s) pre-mating

TOXIC EFFECTS :: Reproductive - Paternal Effects - prostate, seminal vesicle, Cowper's gland, accessory glands

REFERENCE :: TXAPA9 Toxicology and Applied Pharmacology. (Academic Press, Inc., 1 E. First St., Duluth, MN 55802) V.1- 1959- Volume(issue)/page/year: 21,55,1972

TYPE OF TEST :: TDLo - Lowest published toxic dose

ROUTE OF EXPOSURE :: Oral

DOSE :: 231 mg/kg

SEX/DURATION :: male 7 day(s) pre-mating

TOXIC EFFECTS :: Reproductive - Paternal Effects - testes, epididymis, sperm duct Reproductive - Paternal Effects - prostate, seminal vesicle, Cowper's gland, accessory glands

REFERENCE :: TXAPA9 Toxicology and Applied Pharmacology. (Academic Press, Inc., 1 E. First St., Duluth, MN 55802) V.1- 1959- Volume(issue)/page/year: 21,80,1972

TYPE OF TEST :: TDLo - Lowest published toxic dose

ROUTE OF EXPOSURE :: Subcutaneous

DOSE :: 3 mg/kg

SEX/DURATION :: female 3 day(s) pre-mating

TOXIC EFFECTS :: Reproductive - Maternal Effects - uterus, cervix, vagina

REFERENCE :: TXAPA9 Toxicology and Applied Pharmacology. (Academic Press, Inc., 1 E. First St., Duluth, MN 55802) V.1- 1959- Volume(issue)/page/year: 21,68,1972

TYPE OF TEST :: TDLo - Lowest published toxic dose

ROUTE OF EXPOSURE :: Oral

DOSE :: 210 mg/kg

SEX/DURATION :: male 21 day(s) pre-mating

TOXIC EFFECTS :: Reproductive - Paternal Effects - prostate, seminal vesicle, Cowper's gland, accessory glands

REFERENCE :: TXAPA9 Toxicology and Applied Pharmacology. (Academic Press, Inc., 1 E. First St., Duluth, MN 55802) V.1- 1959- Volume(issue)/page/year: 21,55,1972

TYPE OF TEST :: TDLo - Lowest published toxic dose

ROUTE OF EXPOSURE :: Oral

DOSE :: 10 gm/kg

SEX/DURATION :: male 40 day(s) pre-mating

TOXIC EFFECTS :: Reproductive - Paternal Effects - prostate, seminal vesicle, Cowper's gland, accessory glands Reproductive - Paternal Effects - other effects on male

REFERENCE :: APTSAI Acta Pharmacologica et Toxicologica, Supplementun. (Munksgaard International Pub., POB 2148, DK-1016 Copenhagen K, Denmark) No.1- 1947- Volume(issue)/page/year: 36(3),93,1975

TYPE OF TEST :: TDLo - Lowest published toxic dose

ROUTE OF EXPOSURE :: Oral

DOSE :: 400 mg/kg

SEX/DURATION :: male 40 day(s) pre-mating

TOXIC EFFECTS :: Reproductive - Paternal Effects - spermatogenesis (incl. genetic material, sperm morphology, motility, and count) Reproductive - Paternal Effects - testes, epididymis, sperm duct

REFERENCE :: APTSAI Acta Pharmacologica et Toxicologica, Supplementun. (Munksgaard International Pub., POB 2148, DK-1016 Copenhagen K, Denmark) No.1- 1947- Volume(issue)/page/year: 36(3),93,1975

TYPE OF TEST :: TDLo - Lowest published toxic dose

ROUTE OF EXPOSURE :: Oral

DOSE :: 400 mg/kg

SEX/DURATION :: male 40 day(s) pre-mating

TOXIC EFFECTS :: Reproductive - Paternal Effects - prostate, seminal vesicle, Cowper's gland, accessory glands

REFERENCE :: APTSAI Acta Pharmacologica et Toxicologica, Supplementun. (Munksgaard International Pub., POB 2148, DK-1016 Copenhagen K, Denmark) No.1- 1947- Volume(issue)/page/year: 31(1),17,1972

TYPE OF TEST :: TDLo - Lowest published toxic dose

ROUTE OF EXPOSURE :: Oral

DOSE :: 28 mg/kg

SEX/DURATION :: male 28 day(s) pre-mating

TOXIC EFFECTS :: Reproductive - Paternal Effects - spermatogenesis (incl. genetic material, sperm morphology, motility, and count)

REFERENCE :: APTSAI Acta Pharmacologica et Toxicologica, Supplementun. (Munksgaard International Pub., POB 2148, DK-1016 Copenhagen K, Denmark) No.1- 1947- Volume(issue)/page/year: 36(3),81,1975

TYPE OF TEST :: TDLo - Lowest published toxic dose

ROUTE OF EXPOSURE :: Oral

DOSE :: 280 mg/kg

SEX/DURATION :: male 28 day(s) pre-mating

TOXIC EFFECTS :: Reproductive - Paternal Effects - testes, epididymis, sperm duct

REFERENCE :: APTSAI Acta Pharmacologica et Toxicologica, Supplementun. (Munksgaard International Pub., POB 2148, DK-1016 Copenhagen K, Denmark) No.1- 1947- Volume(issue)/page/year: 36(3),81,1975

TYPE OF TEST :: TDLo - Lowest published toxic dose

ROUTE OF EXPOSURE :: Oral

DOSE :: 4 mg/kg

SEX/DURATION :: male 2 day(s) pre-mating

TOXIC EFFECTS :: Reproductive - Paternal Effects - testes, epididymis, sperm duct

REFERENCE :: JRPFA4 Journal of Reproduction and Fertility. (Biochemical Soc. Book Depot, POB 32, Commerce Way, Colchester, Essex CO2 8HP, UK) V.1- 1960- Volume(issue)/page/year: 31,517,1972

TYPE OF TEST :: TDLo - Lowest published toxic dose

ROUTE OF EXPOSURE :: Oral

DOSE :: 1800 ug/kg

SEX/DURATION :: male 18 day(s) pre-mating

TOXIC EFFECTS :: Reproductive - Paternal Effects - spermatogenesis (incl. genetic material, sperm morphology, motility, and count)

REFERENCE :: IJANDP International Journal of Andrology. (Scriptor Publisher ApS, 15 Gasvaerksvej, DK-1656 Copenhagen V, Denmark) V.1- 1978- Volume(issue)/page/year: 1,378,1978

Synonyms

Thiocyanic acid,4-methyl-2,6-bis(methylamino)-3,5-pyridinediyl ester

2,6-cis-diphenylhexamethylcyclotetrasiloxane

2,6-Bis-methylamino-4-methyl-3,5-dithiocyanato-pyridin

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