Sodium hydrogen di(acetate)

Toxicological Summary

Workers - Hazard via inhalation route

Systemic effects

Long term exposure

Hazard assessment conclusion:

DNEL (Derived No Effect Level)

Value:

116.4 mg/m³

Most sensitive endpoint:

repeated dose toxicity

DNEL related information

Modified dose descriptor starting point:

NOAEC

Acute/short term exposure

Hazard assessment conclusion:

DNEL (Derived No Effect Level)

Value:

232.7 mg/m³

Most sensitive endpoint:

repeated dose toxicity

DNEL related information

Modified dose descriptor starting point:

NOAEC

Local effects

Acute/short term exposure

DNEL related information

Workers - Hazard via dermal route

Systemic effects

Long term exposure

Hazard assessment conclusion:

DNEL (Derived No Effect Level)

Value:

1.32 mg/kg bw/day

Most sensitive endpoint:

repeated dose toxicity

DNEL related information

Overall assessment factor (AF):

100

Modified dose descriptor starting point:

NOAEL

Acute/short term exposure

Hazard assessment conclusion:

DNEL (Derived No Effect Level)

Value:

2.64 mg/kg bw/day

Most sensitive endpoint:

repeated dose toxicity

DNEL related information

Overall assessment factor (AF):

50

Modified dose descriptor starting point:

NOAEL

Additional information - workers

A.- ACUTE TOXICITY:

Oral exposure. Systemic effects

Starting point for acute oral effects is NOAEL=132  mg/kg/day derived from repeat dose toxicity report. Assessment factors are to be applied as follows:

(1)    the allometric scaling factor for the rat is 4;

(2)    a default factor of 2.5 accounts for additional interspecies differences;

(3)    for intraspecies differences (workers) the default factor is 5, for consumers is 10

 

For workers: DNEL= 2.64 mg/kg/day

Dermal exposure. Systemic effects

Starting point for systemic effects is oral repeat dose toxicity test were NOAEL= 132 mg/kg/day. Assessment factors are to be applied as follows:

(4)    the allometric scaling factor for the rat is 4;

(5)    a default factor of 2.5 accounts for additional interspecies differences;

(6)    for intraspecies differences (workers) the default factor is 5,

 

For workers: DNEL= 2.64 mg/kg/day

  

Inhalatory exposure. Systemic effects

Taking acute oral toxicity as a starting point, and assuming 100% absorption, critical exposures levels are as follows:

For workers: DNEL= 232.7mg/m³

 

 

B.- SKIN IRRITATION

No effects on skin irritation have been reported. Therefore this hazard is of no concern.

 

C.- REPEAT DOSE TOXICITY: Systemic effects

Dermal exposure

Dermal risk assessment is based on the oral NOAEL of 132 mg/kg/day from the repeat dose toxicity test. The worst case (100% absorption) was assumed.

The following adjustment factors are applied for the identification of the reference MOS:

(1) for duration adjustment a factor of 2 is used,

(2) the allometric scaling factor for the rat is 4;

(3) a default factor of 2.5 accounts for additional interspecies differences;

(4) for intraspecies differences (workers) the default factor is 5,

 

This gives a reference MOS of 100 for workers (2x 4 x 2.5 x 5).DNEL_syst.Dermal route is established in 1.32 mg/kg/day (workers).

Oral exposure

Starting point is NOAEL of 132 mg/kg/day from a repeat dose toxicity rat study. Assuming 100% absorption and the AF described above, critical exposure levels are as follows:

Workers: 132/100= 1.32 mg/kg/day

Inhalatory exposure

The same starting point is taken as previous calculations.

For workers: DNEL= 116.4mg/m³

C.- REPRODUCTIVE

Oral exposure

Starting point is NOAEL_{maternal tox}.= 665.5 mg/kg/day The same NOEAL was stablished for reproductive effects.

 The following adjustment factors are applied for the identification of the reference MOS:

(1) the allometric scaling factor for the rat is 4;

(2) a default factor of 2.5 accounts for additional interspecies differences;

(3) for intraspecies differences (workers) the default factor is 5,

 

Overall the reference MOS is 50 (4 x 2.5 x 5). The respective critical dermal exposure level at the workplace is identified as DNEL =13.31 mg /kg/day for workers.

For DNEL_development=23.7mg/kg/bw.

Dermal exposure

Same starting point and same AF were used for deriving DNELs. Worst case of 100% absorption was assumed.

General Population - Hazard via inhalation route

Systemic effects

Long term exposure

Hazard assessment conclusion:

DNEL (Derived No Effect Level)

Value:

57.4 mg/m³

Most sensitive endpoint:

repeated dose toxicity

DNEL related information

Overall assessment factor (AF):

1.15

Modified dose descriptor starting point:

NOAEC

Acute/short term exposure

Hazard assessment conclusion:

DNEL (Derived No Effect Level)

Value:

114.8 mg/m³

Most sensitive endpoint:

repeated dose toxicity

DNEL related information

Overall assessment factor (AF):

1.15

Modified dose descriptor starting point:

NOAEC

Local effects

Acute/short term exposure

DNEL related information

General Population - Hazard via dermal route

Systemic effects

Long term exposure

Hazard assessment conclusion:

DNEL (Derived No Effect Level)

Value:

0.66 mg/kg bw/day

Most sensitive endpoint:

repeated dose toxicity

DNEL related information

Overall assessment factor (AF):

200

Modified dose descriptor starting point:

NOAEL

Acute/short term exposure

Hazard assessment conclusion:

DNEL (Derived No Effect Level)

Value:

1.32 mg/kg bw/day

Most sensitive endpoint:

repeated dose toxicity

DNEL related information

Overall assessment factor (AF):

100

Modified dose descriptor starting point:

NOAEL

General Population - Hazard via oral route

Systemic effects

Long term exposure

Hazard assessment conclusion:

DNEL (Derived No Effect Level)

Value:

0.66 mg/kg bw/day

Most sensitive endpoint:

repeated dose toxicity

DNEL related information

Overall assessment factor (AF):

200

Modified dose descriptor starting point:

NOAEL

Acute/short term exposure

Hazard assessment conclusion:

DNEL (Derived No Effect Level)

Value:

1.32 mg/kg bw/day

Most sensitive endpoint:

repeated dose toxicity

DNEL related information

Overall assessment factor (AF):

100

Modified dose descriptor starting point:

NOAEL

Additional information - General Population

A.- ACUTE TOXICITY:

Oral exposure.Systemic effects

Starting point for acute oral effects is NOAEL=132  mg/kg/day derived from repeat dose toxicity report. Assessment factors are to be applied as follows:

(1)    the allometric scaling factor for the rat is 4;

(2)    a default factor of 2.5 accounts for additional interspecies differences;

(3)    for intraspecies differences the factor for consumers is 10

 

For consumers: DNEL= 1.32 mg/kg/day

Dermal exposure. Systemic effects

Starting point for systemic effects is oral repeat dose toxicity test were NOAEL= 132 mg/kg/day. Assessment factors are to be applied as follows:

(4)    the allometric scaling factor for the rat is 4;

(5)    a default factor of 2.5 accounts for additional interspecies differences;

(6)     for intraspecies differences the factor for consumers is 10

 

For consumers: DNEL= 1.32 mg/kg/day

  

Inhalatory exposure. Systemic effects

Taking acute oral toxicity as a starting point, and assuming 100% absorption, critical exposures levels are as follows:

For consumers: DNEL= 114.8mg/ m³

  

B.- SKIN IRRITATION

No effects on skin irritation have been reported. Therefore this hazard is of no concern.

 

C.- REPEAT DOSE TOXICITY: Systemic effects

Dermal exposure

Dermal risk assessment is based on the oral NOAEL of 132 mg/kg/day from the repeat dose toxicity test. The worst case (100% absorption) was assumed.

The following adjustment factors are applied for the identification of the reference MOS:

(1) for duration adjustment a factor of 2 is used,

(2) the allometric scaling factor for the rat is 4;

(3) a default factor of 2.5 accounts for additional interspecies differences;

(4) for intraspecies differences (consumers) the default factor is 10,

 

This gives a reference MOS of 200 for consumers (2 x 4 x 2.5 x 10). DNEL_syst.Dermal route is established in 0.66 mg/kg/day (consumers).

Oral exposure

Starting point is NOAEL of 132 mg/kg/day from a repeat dose toxicity rat study. Assuming 100% absorption and the AF described above, critical exposure levels are as follows:

Consumers: 132/200= 0.66 mg/kg/day

Inhalatory exposure

Same starting point is taken as previous calculations.

For consumers: DNEL= 57.4mg/ m³

C.- REPRODUCTIVE

Oral exposure

Starting point is NOAEL_{maternal tox}= 665.5 mg/kg/day Thesame NOEAL was stablished for reproductive effects.

 The following adjustment factors are applied for the identification of the reference MOS:

(1) the allometric scaling factor for the rat is 4;

(2) a default factor of 2.5 accounts for additional interspecies differences;

(3) for intraspecies differences (consumers) the default factor is 10,

 

Overall the reference MOS is 50 (4 x 2.5 x 10). The respective critical dermal exposure level at the workplace is identified as DNEL =6.65 mg /kg/day for workers.

For DNEL_development=11.85mg/kg/bw.

Dermal exposure

Same starting point and same AF were used for deriving DNELs. Worst case of 100% absorption was assumed.