*** CHEMICAL IDENTIFICATION ***
RTECS NUMBER : UR6493200
CHEMICAL NAME : 3(2H)-Pyridazinone, 4-ethoxy-2-methyl-5-morpholino-
CAS REGISTRY NUMBER : 38957-41-4
BEILSTEIN REFERENCE NO. : 0995465
LAST UPDATED : 199612
DATA ITEMS CITED : 22
MOLECULAR FORMULA : C11-H17-N3-O3
MOLECULAR WEIGHT : 239.31
WISWESSER LINE NOTATION : T6NNVJ B1 DO2 E- AT6N DOTJ
COMPOUND DESCRIPTOR : Drug
Mutagen
Reproductive Effector
SYNONYMS/TRADE NAMES :
* Emorfazone
* 4-Ethoxy-2-methyl-5-morpholino-3(2H)-pyridazinone
* 4-Ethoxy-2-methyl-5-(4-morpholinyl)-3(2H)-pyridazinone
* M73101
* Nandron
*** 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 : 1900 mg/kg
TOXIC EFFECTS :
Behavioral - changes in motor activity (specific assay)
Behavioral - ataxia
Lungs, Thorax, or Respiration - respiratory depression
REFERENCE :
OYYAA2 Oyo Yakuri. Pharmacometrics. (Oyo Yakuri Kenkyukai, CPO Box 180,
Sendai 980-91, Japan) V.1- 1967- Volume(issue)/page/year: 16,1011,1978
TYPE OF TEST : LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE : Intraperitoneal
SPECIES OBSERVED : Rodent - rat
DOSE/DURATION : 600 mg/kg
TOXIC EFFECTS :
Behavioral - changes in motor activity (specific assay)
Behavioral - ataxia
Lungs, Thorax, or Respiration - respiratory depression
REFERENCE :
OYYAA2 Oyo Yakuri. Pharmacometrics. (Oyo Yakuri Kenkyukai, CPO Box 180,
Sendai 980-91, Japan) V.1- 1967- Volume(issue)/page/year: 16,1011,1978
TYPE OF TEST : LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE : Subcutaneous
SPECIES OBSERVED : Rodent - rat
DOSE/DURATION : 720 mg/kg
TOXIC EFFECTS :
Behavioral - changes in motor activity (specific assay)
Behavioral - ataxia
Lungs, Thorax, or Respiration - respiratory depression
REFERENCE :
OYYAA2 Oyo Yakuri. Pharmacometrics. (Oyo Yakuri Kenkyukai, CPO Box 180,
Sendai 980-91, Japan) V.1- 1967- Volume(issue)/page/year: 16,1011,1978
TYPE OF TEST : LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE : Intravenous
SPECIES OBSERVED : Rodent - rat
DOSE/DURATION : 340 mg/kg
TOXIC EFFECTS :
Behavioral - changes in motor activity (specific assay)
Behavioral - ataxia
Lungs, Thorax, or Respiration - respiratory depression
REFERENCE :
OYYAA2 Oyo Yakuri. Pharmacometrics. (Oyo Yakuri Kenkyukai, CPO Box 180,
Sendai 980-91, Japan) V.1- 1967- Volume(issue)/page/year: 16,1011,1978
TYPE OF TEST : LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE : Oral
SPECIES OBSERVED : Rodent - mouse
DOSE/DURATION : 960 mg/kg
TOXIC EFFECTS :
Behavioral - changes in motor activity (specific assay)
Behavioral - ataxia
Lungs, Thorax, or Respiration - respiratory depression
REFERENCE :
OYYAA2 Oyo Yakuri. Pharmacometrics. (Oyo Yakuri Kenkyukai, CPO Box 180,
Sendai 980-91, Japan) V.1- 1967- Volume(issue)/page/year: 16,1011,1978
TYPE OF TEST : LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE : Intraperitoneal
SPECIES OBSERVED : Rodent - mouse
DOSE/DURATION : 620 mg/kg
TOXIC EFFECTS :
Behavioral - changes in motor activity (specific assay)
Behavioral - ataxia
Lungs, Thorax, or Respiration - respiratory depression
REFERENCE :
OYYAA2 Oyo Yakuri. Pharmacometrics. (Oyo Yakuri Kenkyukai, CPO Box 180,
Sendai 980-91, Japan) V.1- 1967- Volume(issue)/page/year: 16,1011,1978
TYPE OF TEST : LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE : Subcutaneous
SPECIES OBSERVED : Rodent - mouse
DOSE/DURATION : 750 mg/kg
TOXIC EFFECTS :
Behavioral - changes in motor activity (specific assay)
Behavioral - ataxia
Lungs, Thorax, or Respiration - respiratory depression
REFERENCE :
OYYAA2 Oyo Yakuri. Pharmacometrics. (Oyo Yakuri Kenkyukai, CPO Box 180,
Sendai 980-91, Japan) V.1- 1967- Volume(issue)/page/year: 16,1011,1978
TYPE OF TEST : LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE : Intravenous
SPECIES OBSERVED : Rodent - mouse
DOSE/DURATION : 305 mg/kg
TOXIC EFFECTS :
Behavioral - changes in motor activity (specific assay)
Behavioral - ataxia
Lungs, Thorax, or Respiration - respiratory depression
REFERENCE :
OYYAA2 Oyo Yakuri. Pharmacometrics. (Oyo Yakuri Kenkyukai, CPO Box 180,
Sendai 980-91, Japan) V.1- 1967- Volume(issue)/page/year: 16,1011,1978
TYPE OF TEST : LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE : Intravenous
SPECIES OBSERVED : Mammal - dog
DOSE/DURATION : 310 mg/kg
TOXIC EFFECTS :
Behavioral - changes in motor activity (specific assay)
Behavioral - ataxia
Lungs, Thorax, or Respiration - respiratory depression
REFERENCE :
OYYAA2 Oyo Yakuri. Pharmacometrics. (Oyo Yakuri Kenkyukai, CPO Box 180,
Sendai 980-91, Japan) V.1- 1967- Volume(issue)/page/year: 16,1011,1978
TYPE OF TEST : LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE : Oral
SPECIES OBSERVED : Rodent - rabbit
DOSE/DURATION : 840 mg/kg
TOXIC EFFECTS :
Behavioral - changes in motor activity (specific assay)
Behavioral - ataxia
Lungs, Thorax, or Respiration - respiratory depression
REFERENCE :
OYYAA2 Oyo Yakuri. Pharmacometrics. (Oyo Yakuri Kenkyukai, CPO Box 180,
Sendai 980-91, Japan) V.1- 1967- Volume(issue)/page/year: 16,1011,1978
TYPE OF TEST : LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE : Intravenous
SPECIES OBSERVED : Rodent - rabbit
DOSE/DURATION : 230 mg/kg
TOXIC EFFECTS :
Behavioral - changes in motor activity (specific assay)
Behavioral - ataxia
Lungs, Thorax, or Respiration - respiratory depression
REFERENCE :
OYYAA2 Oyo Yakuri. Pharmacometrics. (Oyo Yakuri Kenkyukai, CPO Box 180,
Sendai 980-91, Japan) V.1- 1967- Volume(issue)/page/year: 16,1011,1978
** OTHER MULTIPLE DOSE TOXICITY DATA **
TYPE OF TEST : TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE : Oral
SPECIES OBSERVED : Rodent - rat
DOSE/DURATION : 182 gm/kg/26W-I
TOXIC EFFECTS :
Liver - other changes
Kidney, Ureter, Bladder - changes in bladder weight
Blood - changes in serum composition (e.g. TP, bilirubin, cholesterol)
REFERENCE :
JTSCDR Journal of Toxicological Sciences. (Japanese Soc. of Toxicological
Sciences, 4th Floor, Gakkai Center Bldg., 4-16, Yayoi 2-chome, Bunkyo-ku,
Tokyo 113, Japan) V.1- 1976- Volume(issue)/page/year: 4,255,1979
TYPE OF TEST : TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE : Oral
SPECIES OBSERVED : Rodent - rat
DOSE/DURATION : 21 gm/kg/6W-I
TOXIC EFFECTS :
Liver - changes in liver weight
Kidney, Ureter, Bladder - changes in bladder weight
Biochemical - Enzyme inhibition, induction, or change in blood or tissue
levels - transaminases
REFERENCE :
JTSCDR Journal of Toxicological Sciences. (Japanese Soc. of Toxicological
Sciences, 4th Floor, Gakkai Center Bldg., 4-16, Yayoi 2-chome, Bunkyo-ku,
Tokyo 113, Japan) V.1- 1976- Volume(issue)/page/year: 4,139,1979
TYPE OF TEST : TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE : Oral
SPECIES OBSERVED : Mammal - dog
DOSE/DURATION : 45360 mg/kg/27W-I
TOXIC EFFECTS :
Liver - other changes
Liver - changes in liver weight
Biochemical - Enzyme inhibition, induction, or change in blood or tissue
levels - phosphatases
REFERENCE :
JTSCDR Journal of Toxicological Sciences. (Japanese Soc. of Toxicological
Sciences, 4th Floor, Gakkai Center Bldg., 4-16, Yayoi 2-chome, Bunkyo-ku,
Tokyo 113, Japan) V.1- 1976- Volume(issue)/page/year: 4,229,1979
** REPRODUCTIVE DATA **
TYPE OF TEST : TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE : Oral
SPECIES OBSERVED : Rodent - rat
DOSE : 4200 mg/kg
SEX/DURATION : female 9-15 day(s) after conception
TOXIC EFFECTS :
Reproductive - Effects on Embryo or Fetus - fetotoxicity (except death,
e.g., stunted fetus)
Reproductive - Effects on Newborn - sex ratio
REFERENCE :
JTSCDR Journal of Toxicological Sciences. (Japanese Soc. of Toxicological
Sciences, 4th Floor, Gakkai Center Bldg., 4-16, Yayoi 2-chome, Bunkyo-ku,
Tokyo 113, Japan) V.1- 1976- Volume(issue)/page/year: 3,69,1978
TYPE OF TEST : TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE : Oral
SPECIES OBSERVED : Rodent - rat
DOSE : 700 mg/kg
SEX/DURATION : female 9-15 day(s) after conception
TOXIC EFFECTS :
Reproductive - Effects on Newborn - growth statistics (e.g.%, reduced weight
gain)
REFERENCE :
JTSCDR Journal of Toxicological Sciences. (Japanese Soc. of Toxicological
Sciences, 4th Floor, Gakkai Center Bldg., 4-16, Yayoi 2-chome, Bunkyo-ku,
Tokyo 113, Japan) V.1- 1976- Volume(issue)/page/year: 3,69,1978
TYPE OF TEST : TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE : Oral
SPECIES OBSERVED : Rodent - rat
DOSE : 16200 mg/kg
SEX/DURATION : female 17-22 day(s) after conception
lactating female 21 day(s) post-birth
TOXIC EFFECTS :
Reproductive - Effects on Newborn - sex ratio
REFERENCE :
OYYAA2 Oyo Yakuri. Pharmacometrics. (Oyo Yakuri Kenkyukai, CPO Box 180,
Sendai 980-91, Japan) V.1- 1967- Volume(issue)/page/year: 18,429,1979
TYPE OF TEST : TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE : Oral
SPECIES OBSERVED : Rodent - rat
DOSE : 6750 mg/kg
SEX/DURATION : female 17-22 day(s) after conception
lactating female 21 day(s) post-birth
TOXIC EFFECTS :
Reproductive - Specific Developmental Abnormalities - musculoskeletal system
REFERENCE :
OYYAA2 Oyo Yakuri. Pharmacometrics. (Oyo Yakuri Kenkyukai, CPO Box 180,
Sendai 980-91, Japan) V.1- 1967- Volume(issue)/page/year: 18,429,1979
TYPE OF TEST : TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE : Oral
SPECIES OBSERVED : Rodent - mouse
DOSE : 5600 mg/kg
SEX/DURATION : female 7-13 day(s) after conception
TOXIC EFFECTS :
Reproductive - Effects on Embryo or Fetus - fetotoxicity (except death,
e.g., stunted fetus)
REFERENCE :
JTSCDR Journal of Toxicological Sciences. (Japanese Soc. of Toxicological
Sciences, 4th Floor, Gakkai Center Bldg., 4-16, Yayoi 2-chome, Bunkyo-ku,
Tokyo 113, Japan) V.1- 1976- Volume(issue)/page/year: 3,69,1978
TYPE OF TEST : TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE : Oral
SPECIES OBSERVED : Rodent - mouse
DOSE : 2800 mg/kg
SEX/DURATION : female 7-13 day(s) after conception
TOXIC EFFECTS :
Reproductive - Specific Developmental Abnormalities - musculoskeletal system
REFERENCE :
JTSCDR Journal of Toxicological Sciences. (Japanese Soc. of Toxicological
Sciences, 4th Floor, Gakkai Center Bldg., 4-16, Yayoi 2-chome, Bunkyo-ku,
Tokyo 113, Japan) V.1- 1976- Volume(issue)/page/year: 3,69,1978
TYPE OF TEST : TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE : Oral
SPECIES OBSERVED : Rodent - mouse
DOSE : 500 mg/kg
SEX/DURATION : male 1 day(s) pre-mating
TOXIC EFFECTS :
Reproductive - Fertility - pre-implantation mortality (e.g. reduction in
number of implants per female; total number of implants per corpora lutea)
REFERENCE :
IYKEDH Iyakuhin Kenkyu. Study of Medical Supplies. (Nippon Koteisho
Kyokai, 12-15, 2-chome, Shibuya, Shibuya-ku, Tokyo 150, Japan) V.1- 1970-
Volume(issue)/page/year: 11,559,1980
** MUTATION DATA **
TYPE OF TEST : Dominant lethal test
ROUTE OF EXPOSURE : Oral
TEST SYSTEM : Rodent - mouse
DOSE/DURATION : 500 mg/kg
REFERENCE :
IYKEDH Iyakuhin Kenkyu. Study of Medical Supplies. (Nippon Koteisho
Kyokai, 12-15, 2-chome, Shibuya, Shibuya-ku, Tokyo 150, Japan) V.1- 1970-
Volume(issue)/page/year: 11,559,1980
*** END OF RECORD ***