China Factory Supply High Activity Acid Protease Food Grade Manufacturer, Exporter

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China Factory Supply High Activity Acid Protease Food Grade Manufacturer, Exporter

Product name：Acid Protease
Apperance：White powder
Specification：3000U/G
Test method：HPLC/UV
Delivery : EXW,FOB,CFR,CIF,DAP,DDP
Packaging: 20 kgs/drum or customized packaging available
Payment : T/T bank transfer, Western Union，PayPal
Shelf time：2 years,keep away sunlight, keep dry

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Product Description

Product description

Acid protease is produced by fermentation, extraction and refining using high-quality screened Aspergillus niger strains. It efficiently hydrolyzes proteins into amino acids and polypeptides under low pH conditions (pH 2.5–4.0). As an aspartic protease with an aspartic acid active center, it is widely applied in food, nutritional supplements, animal feed, vinegar, alcohol and soy sauce brewing, as well as leather processing industries to boost the nutritional value and additional added value of finished products.

Product Features

Temperature range: 30–60°C, optimal temperature: 40–50°C

pH range: 2.0–6.0, optimal pH: 2.5–3.5

Acid Protease Activity: 300,000 units per gram (u/g)

Enzyme Activity Definition: Under the conditions of 40°C and pH 3.0, 1 unit of enzyme activity (u/g) refers to the quantity of enzyme powder that can hydrolyze casein to generate 1 μg tyrosine within 1 minute per gram of enzyme powder.

Certificate of Analysis

Product Name:	Papain	Part Plant:	PAPAYA
Origin:	China	Manufacturer Date:	2026-01-23
Batch No.:	SH260123PA6	/	/
ITEMS OF ANALYSIS		SPECIFICATIONS	RESULTS
Appearance Odor Activity of enzyme Loss on drying Loss on ignition Heavy metals (as Pb) Heavy metals (as As)		White Powder Free of offensive odours ≥6,000USP U/mg ≤5.0% ≤5.0% ≤2.0mg/kg ≤2.0mg/kg	Conform Conform 6,761USP U/mg 2.31% 1.91% ＜2.0mg/kg ＜2.0mg/kg
Microbiology
Total Plate Count E.Coli Salmonella Yeast and Mould		<10,000cfu/g None detected in 10g None detected in 10g NMT 100 cfu/g	<500cfu/g Absent Absent conform
Storage		STORED HUMIDITY PROTECTED (RH LESS THAN 60) AT TEMPERATURE BELOW 25℃
Shelf Life		1 Year when Properly Stored

Functions & Applications

Food Industry: For hydrolysis of animal and plant proteins, it improves food flavor, boosts nutritional value and optimizes product quality.
Alcohol Industry: Acid protease is applied in alcohol fermentation of grain raw materials with a dosage of 0.05–0.15 kg per ton of raw materials. It promotes yeast reproduction, accelerates fermentation rate and raises raw material utilization efficiency.

Packing

Weight	Packing method
1kg	bag/kg, box outside (double plastic bag + Aluminum foil bag inside)
10kgs, 25kg or more	by Drums or carton (2 layers plastic bag inside)

Delivery & Logistics

Weight	Delivery method	Delivery time	Destination
1kg-25kgs	EMS, DHL, UPS, Fedex	3-7days	Door to door
25kgs-100kgs	DHL, FedEx, by Air	3-7days	Door to door (to Airport by Air)
more than 100kgs	by Air	3-7days	Door to Airport
more than 100kgs	by Sea	10-35days	Door to port

Frequently Asked Questions

What is Acid Protease and how is it produced?

Acid protease is an aspartic protease produced through the fermentation, extraction, and refining of high-quality, screened Aspergillus niger strains. It works by efficiently hydrolyzing proteins into amino acids and polypeptides under low pH conditions.

What are the optimal operating temperature and pH ranges for Acid Protease?

The optimal operating temperature range is between 40°C and 50°C (with an overall active range of 30–60°C). The optimal pH range is 2.5 to 3.5 (with an active range of 2.0–6.0).

How is the activity of this enzyme defined?

This product has an activity of 300,000 units per gram (u/g). One unit of activity is defined as the amount of enzyme powder required to hydrolyze casein to yield 1 μg of tyrosine per minute at 40°C and pH 3.0.

What are the primary applications of Acid Protease?

It is widely used in the food industry to hydrolyze animal and plant proteins, as well as in alcohol fermentation, brewing (vinegar, soy sauce), nutritional supplements, animal feed, and leather processing.

How should the product be stored to ensure its shelf life?

The product should be stored in a humidity-protected environment (relative humidity under 60%) at temperatures below 25°C. Properly stored, the product maintains a shelf life of 1 year.

What packaging options and delivery terms are available?

For smaller amounts (1kg), we package in double plastic bags inside an aluminum foil bag and box. Quantities of 10kg, 25kg or more are packed in drums or cartons. Delivery is available worldwide via express couriers (EMS, DHL, UPS, Fedex), air freight, or sea cargo depending on the weight.